721595680

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^2$

素因数の和:128

約数の個数: 216

約数和(自身を含む): 2002138236

約数和(自身を除く): 1280542556

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 31, 32, 38, 40, 52, 62, 65, 76, 80, 95, 104, 124, 130, 152, 155, 160, 190, 208, 247, 248, 260, 304, 310, 361, 380, 403, 416, 494, 496, 520, 589, 608, 620, 722, 760, 806, 961, 988, 992, 1040, 1178, 1235, 1240, 1444, 1520, 1612, 1805, 1922, 1976, 2015, 2080, 2356, 2470, 2480, 2888, 2945, 3040, 3224, 3610, 3844, 3952, 4030, 4693, 4712, 4805, 4940, 4960, 5776, 5890, 6448, 7220, 7657, 7688, 7904, 8060, 9386, 9424, 9610, 9880, 11191, 11552, 11780, 12493, 12896, 14440, 15314, 15376, 16120, 18259, 18772, 18848, 19220, 19760, 22382, 23465, 23560, 24986, 28880, 30628, 30752, 32240, 36518, 37544, 38285, 38440, 39520, 44764, 46930, 47120, 49972, 55955, 57760, 61256, 62465, 64480, 73036, 75088, 76570, 76880, 89528, 91295, 93860, 94240, 99944, 111910, 122512, 124930, 145483, 146072, 150176, 153140, 153760, 179056, 182590, 187720, 199888, 223820, 237367, 245024, 249860, 290966, 292144, 306280, 346921, 358112, 365180, 375440, 399776, 447640, 474734, 499720, 581932, 584288, 612560, 693842, 727415, 730360, 750880, 895280, 949468, 999440, 1163864, 1186835, 1225120, 1387684, 1454830, 1460720, 1734605, 1790560, 1898936, 1998880, 2327728, 2373670, 2775368, 2909660, 2921440, 3469210, 3797872, 4509973, 4655456, 4747340, 5550736, 5819320, 6938420, 7595744, 9019946, 9494680, 11101472, 11638640, 13876840, 18039892, 18989360, 22549865, 23277280, 27753680, 36079784, 37978720, 45099730, 55507360, 72159568, 90199460, 144319136, 180398920, 360797840, 721595680]

約数ペア:

[(1, 721595680), (2, 360797840), (4, 180398920), (5, 144319136), (8, 90199460), (10, 72159568), (13, 55507360), (16, 45099730), (19, 37978720), (20, 36079784), (26, 27753680), (31, 23277280), (32, 22549865), (38, 18989360), (40, 18039892), (52, 13876840), (62, 11638640), (65, 11101472), (76, 9494680), (80, 9019946), (95, 7595744), (104, 6938420), (124, 5819320), (130, 5550736), (152, 4747340), (155, 4655456), (160, 4509973), (190, 3797872), (208, 3469210), (247, 2921440), (248, 2909660), (260, 2775368), (304, 2373670), (310, 2327728), (361, 1998880), (380, 1898936), (403, 1790560), (416, 1734605), (494, 1460720), (496, 1454830), (520, 1387684), (589, 1225120), (608, 1186835), (620, 1163864), (722, 999440), (760, 949468), (806, 895280), (961, 750880), (988, 730360), (992, 727415), (1040, 693842), (1178, 612560), (1235, 584288), (1240, 581932), (1444, 499720), (1520, 474734), (1612, 447640), (1805, 399776), (1922, 375440), (1976, 365180), (2015, 358112), (2080, 346921), (2356, 306280), (2470, 292144), (2480, 290966), (2888, 249860), (2945, 245024), (3040, 237367), (3224, 223820), (3610, 199888), (3844, 187720), (3952, 182590), (4030, 179056), (4693, 153760), (4712, 153140), (4805, 150176), (4940, 146072), (4960, 145483), (5776, 124930), (5890, 122512), (6448, 111910), (7220, 99944), (7657, 94240), (7688, 93860), (7904, 91295), (8060, 89528), (9386, 76880), (9424, 76570), (9610, 75088), (9880, 73036), (11191, 64480), (11552, 62465), (11780, 61256), (12493, 57760), (12896, 55955), (14440, 49972), (15314, 47120), (15376, 46930), (16120, 44764), (18259, 39520), (18772, 38440), (18848, 38285), (19220, 37544), (19760, 36518), (22382, 32240), (23465, 30752), (23560, 30628), (24986, 28880)]