18972850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{101}}^1$

素因数の和:160

約数の個数: 72

約数和(自身を含む): 40770828

約数和(自身を除く): 21797978

約数列:

[1, 2, 5, 10, 13, 17, 25, 26, 34, 50, 65, 85, 101, 130, 170, 202, 221, 289, 325, 425, 442, 505, 578, 650, 850, 1010, 1105, 1313, 1445, 1717, 2210, 2525, 2626, 2890, 3434, 3757, 5050, 5525, 6565, 7225, 7514, 8585, 11050, 13130, 14450, 17170, 18785, 22321, 29189, 32825, 37570, 42925, 44642, 58378, 65650, 85850, 93925, 111605, 145945, 187850, 223210, 291890, 379457, 558025, 729725, 758914, 1116050, 1459450, 1897285, 3794570, 9486425, 18972850]

約数ペア:

[(1, 18972850), (2, 9486425), (5, 3794570), (10, 1897285), (13, 1459450), (17, 1116050), (25, 758914), (26, 729725), (34, 558025), (50, 379457), (65, 291890), (85, 223210), (101, 187850), (130, 145945), (170, 111605), (202, 93925), (221, 85850), (289, 65650), (325, 58378), (425, 44642), (442, 42925), (505, 37570), (578, 32825), (650, 29189), (850, 22321), (1010, 18785), (1105, 17170), (1313, 14450), (1445, 13130), (1717, 11050), (2210, 8585), (2525, 7514), (2626, 7225), (2890, 6565), (3434, 5525), (3757, 5050)]