31805540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{821}}^1$

素因数の和:992

約数の個数: 48

約数和(自身を含む): 72500400

約数和(自身を除く): 40694860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 149, 260, 298, 596, 745, 821, 1490, 1642, 1937, 2980, 3284, 3874, 4105, 7748, 8210, 9685, 10673, 16420, 19370, 21346, 38740, 42692, 53365, 106730, 122329, 213460, 244658, 489316, 611645, 1223290, 1590277, 2446580, 3180554, 6361108, 7951385, 15902770, 31805540]

約数ペア:

[(1, 31805540), (2, 15902770), (4, 7951385), (5, 6361108), (10, 3180554), (13, 2446580), (20, 1590277), (26, 1223290), (52, 611645), (65, 489316), (130, 244658), (149, 213460), (260, 122329), (298, 106730), (596, 53365), (745, 42692), (821, 38740), (1490, 21346), (1642, 19370), (1937, 16420), (2980, 10673), (3284, 9685), (3874, 8210), (4105, 7748)]