521127740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{389}}^1\times {\mathrm{1367}}^1$

素因数の和:1779

約数の個数: 72

約数和(自身を含む): 1277246880

約数和(自身を除く): 756119140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 389, 490, 778, 980, 1367, 1556, 1945, 2723, 2734, 3890, 5446, 5468, 6835, 7780, 9569, 10892, 13615, 13670, 19061, 19138, 27230, 27340, 38122, 38276, 47845, 54460, 66983, 76244, 95305, 95690, 133966, 190610, 191380, 267932, 334915, 381220, 531763, 669830, 1063526, 1339660, 2127052, 2658815, 3722341, 5317630, 7444682, 10635260, 14889364, 18611705, 26056387, 37223410, 52112774, 74446820, 104225548, 130281935, 260563870, 521127740]

約数ペア:

[(1, 521127740), (2, 260563870), (4, 130281935), (5, 104225548), (7, 74446820), (10, 52112774), (14, 37223410), (20, 26056387), (28, 18611705), (35, 14889364), (49, 10635260), (70, 7444682), (98, 5317630), (140, 3722341), (196, 2658815), (245, 2127052), (389, 1339660), (490, 1063526), (778, 669830), (980, 531763), (1367, 381220), (1556, 334915), (1945, 267932), (2723, 191380), (2734, 190610), (3890, 133966), (5446, 95690), (5468, 95305), (6835, 76244), (7780, 66983), (9569, 54460), (10892, 47845), (13615, 38276), (13670, 38122), (19061, 27340), (19138, 27230)]