31455700

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 71939840

約数和(自身を除く): 40484140

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 73, 100, 124, 139, 146, 155, 278, 292, 310, 365, 556, 620, 695, 730, 775, 1390, 1460, 1550, 1825, 2263, 2780, 3100, 3475, 3650, 4309, 4526, 6950, 7300, 8618, 9052, 10147, 11315, 13900, 17236, 20294, 21545, 22630, 40588, 43090, 45260, 50735, 56575, 86180, 101470, 107725, 113150, 202940, 215450, 226300, 253675, 314557, 430900, 507350, 629114, 1014700, 1258228, 1572785, 3145570, 6291140, 7863925, 15727850, 31455700]

約数ペア:

[(1, 31455700), (2, 15727850), (4, 7863925), (5, 6291140), (10, 3145570), (20, 1572785), (25, 1258228), (31, 1014700), (50, 629114), (62, 507350), (73, 430900), (100, 314557), (124, 253675), (139, 226300), (146, 215450), (155, 202940), (278, 113150), (292, 107725), (310, 101470), (365, 86180), (556, 56575), (620, 50735), (695, 45260), (730, 43090), (775, 40588), (1390, 22630), (1460, 21545), (1550, 20294), (1825, 17236), (2263, 13900), (2780, 11315), (3100, 10147), (3475, 9052), (3650, 8618), (4309, 7300), (4526, 6950)]