28793480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{181}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 67420080

約数和(自身を除く): 38626600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 164, 181, 194, 205, 328, 362, 388, 410, 485, 724, 776, 820, 905, 970, 1448, 1640, 1810, 1940, 3620, 3880, 3977, 7240, 7421, 7954, 14842, 15908, 17557, 19885, 29684, 31816, 35114, 37105, 39770, 59368, 70228, 74210, 79540, 87785, 140456, 148420, 159080, 175570, 296840, 351140, 702280, 719837, 1439674, 2879348, 3599185, 5758696, 7198370, 14396740, 28793480]

約数ペア:

[(1, 28793480), (2, 14396740), (4, 7198370), (5, 5758696), (8, 3599185), (10, 2879348), (20, 1439674), (40, 719837), (41, 702280), (82, 351140), (97, 296840), (164, 175570), (181, 159080), (194, 148420), (205, 140456), (328, 87785), (362, 79540), (388, 74210), (410, 70228), (485, 59368), (724, 39770), (776, 37105), (820, 35114), (905, 31816), (970, 29684), (1448, 19885), (1640, 17557), (1810, 15908), (1940, 14842), (3620, 7954), (3880, 7421), (3977, 7240)]