399967850

素因数分解:

$2^1\times 5^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1847}}^1$

素因数の和:1991

約数の個数: 48

約数和(自身を含む): 767200896

約数和(自身を除く): 367233046

約数列:

[1, 2, 5, 10, 25, 50, 61, 71, 122, 142, 305, 355, 610, 710, 1525, 1775, 1847, 3050, 3550, 3694, 4331, 8662, 9235, 18470, 21655, 43310, 46175, 92350, 108275, 112667, 131137, 216550, 225334, 262274, 563335, 655685, 1126670, 1311370, 2816675, 3278425, 5633350, 6556850, 7999357, 15998714, 39996785, 79993570, 199983925, 399967850]

約数ペア:

[(1, 399967850), (2, 199983925), (5, 79993570), (10, 39996785), (25, 15998714), (50, 7999357), (61, 6556850), (71, 5633350), (122, 3278425), (142, 2816675), (305, 1311370), (355, 1126670), (610, 655685), (710, 563335), (1525, 262274), (1775, 225334), (1847, 216550), (3050, 131137), (3550, 112667), (3694, 108275), (4331, 92350), (8662, 46175), (9235, 43310), (18470, 21655)]