20591440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:105

約数の個数: 120

約数和(自身を含む): 54425088

約数和(自身を除く): 33833648

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 31, 38, 40, 46, 62, 76, 80, 92, 95, 115, 124, 152, 155, 184, 190, 230, 248, 304, 310, 361, 368, 380, 437, 460, 496, 589, 620, 713, 722, 760, 874, 920, 1178, 1240, 1426, 1444, 1520, 1748, 1805, 1840, 2185, 2356, 2480, 2852, 2888, 2945, 3496, 3565, 3610, 4370, 4712, 5704, 5776, 5890, 6992, 7130, 7220, 8303, 8740, 9424, 11191, 11408, 11780, 13547, 14260, 14440, 16606, 17480, 22382, 23560, 27094, 28520, 28880, 33212, 34960, 41515, 44764, 47120, 54188, 55955, 57040, 66424, 67735, 83030, 89528, 108376, 111910, 132848, 135470, 166060, 179056, 216752, 223820, 257393, 270940, 332120, 447640, 514786, 541880, 664240, 895280, 1029572, 1083760, 1286965, 2059144, 2573930, 4118288, 5147860, 10295720, 20591440]

約数ペア:

[(1, 20591440), (2, 10295720), (4, 5147860), (5, 4118288), (8, 2573930), (10, 2059144), (16, 1286965), (19, 1083760), (20, 1029572), (23, 895280), (31, 664240), (38, 541880), (40, 514786), (46, 447640), (62, 332120), (76, 270940), (80, 257393), (92, 223820), (95, 216752), (115, 179056), (124, 166060), (152, 135470), (155, 132848), (184, 111910), (190, 108376), (230, 89528), (248, 83030), (304, 67735), (310, 66424), (361, 57040), (368, 55955), (380, 54188), (437, 47120), (460, 44764), (496, 41515), (589, 34960), (620, 33212), (713, 28880), (722, 28520), (760, 27094), (874, 23560), (920, 22382), (1178, 17480), (1240, 16606), (1426, 14440), (1444, 14260), (1520, 13547), (1748, 11780), (1805, 11408), (1840, 11191), (2185, 9424), (2356, 8740), (2480, 8303), (2852, 7220), (2888, 7130), (2945, 6992), (3496, 5890), (3565, 5776), (3610, 5704), (4370, 4712)]