21213920

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:113

約数の個数: 192

約数和(自身を含む): 65028096

約数和(自身を除く): 43814176

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 31, 32, 35, 40, 47, 52, 56, 62, 65, 70, 80, 91, 94, 104, 112, 124, 130, 140, 155, 160, 182, 188, 208, 217, 224, 235, 248, 260, 280, 310, 329, 364, 376, 403, 416, 434, 455, 470, 496, 520, 560, 611, 620, 658, 728, 752, 806, 868, 910, 940, 992, 1040, 1085, 1120, 1222, 1240, 1316, 1456, 1457, 1504, 1612, 1645, 1736, 1820, 1880, 2015, 2080, 2170, 2444, 2480, 2632, 2821, 2912, 2914, 3055, 3224, 3290, 3472, 3640, 3760, 4030, 4277, 4340, 4888, 4960, 5264, 5642, 5828, 6110, 6448, 6580, 6944, 7280, 7285, 7520, 8060, 8554, 8680, 9776, 10199, 10528, 11284, 11656, 12220, 12896, 13160, 14105, 14560, 14570, 16120, 17108, 17360, 18941, 19552, 20398, 21385, 22568, 23312, 24440, 26320, 28210, 29140, 32240, 34216, 34720, 37882, 40796, 42770, 45136, 46624, 48880, 50995, 52640, 56420, 58280, 64480, 68432, 75764, 81592, 85540, 90272, 94705, 97760, 101990, 112840, 116560, 132587, 136864, 151528, 163184, 171080, 189410, 203980, 225680, 233120, 265174, 303056, 326368, 342160, 378820, 407960, 451360, 530348, 606112, 662935, 684320, 757640, 815920, 1060696, 1325870, 1515280, 1631840, 2121392, 2651740, 3030560, 4242784, 5303480, 10606960, 21213920]

約数ペア:

[(1, 21213920), (2, 10606960), (4, 5303480), (5, 4242784), (7, 3030560), (8, 2651740), (10, 2121392), (13, 1631840), (14, 1515280), (16, 1325870), (20, 1060696), (26, 815920), (28, 757640), (31, 684320), (32, 662935), (35, 606112), (40, 530348), (47, 451360), (52, 407960), (56, 378820), (62, 342160), (65, 326368), (70, 303056), (80, 265174), (91, 233120), (94, 225680), (104, 203980), (112, 189410), (124, 171080), (130, 163184), (140, 151528), (155, 136864), (160, 132587), (182, 116560), (188, 112840), (208, 101990), (217, 97760), (224, 94705), (235, 90272), (248, 85540), (260, 81592), (280, 75764), (310, 68432), (329, 64480), (364, 58280), (376, 56420), (403, 52640), (416, 50995), (434, 48880), (455, 46624), (470, 45136), (496, 42770), (520, 40796), (560, 37882), (611, 34720), (620, 34216), (658, 32240), (728, 29140), (752, 28210), (806, 26320), (868, 24440), (910, 23312), (940, 22568), (992, 21385), (1040, 20398), (1085, 19552), (1120, 18941), (1222, 17360), (1240, 17108), (1316, 16120), (1456, 14570), (1457, 14560), (1504, 14105), (1612, 13160), (1645, 12896), (1736, 12220), (1820, 11656), (1880, 11284), (2015, 10528), (2080, 10199), (2170, 9776), (2444, 8680), (2480, 8554), (2632, 8060), (2821, 7520), (2912, 7285), (2914, 7280), (3055, 6944), (3224, 6580), (3290, 6448), (3472, 6110), (3640, 5828), (3760, 5642), (4030, 5264), (4277, 4960), (4340, 4888)]