77985700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{251}}^1$

素因数の和:517

約数の個数: 72

約数和(自身を含む): 183738240

約数和(自身を除く): 105752540

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 239, 251, 260, 325, 478, 502, 650, 956, 1004, 1195, 1255, 1300, 2390, 2510, 3107, 3263, 4780, 5020, 5975, 6214, 6275, 6526, 11950, 12428, 12550, 13052, 15535, 16315, 23900, 25100, 31070, 32630, 59989, 62140, 65260, 77675, 81575, 119978, 155350, 163150, 239956, 299945, 310700, 326300, 599890, 779857, 1199780, 1499725, 1559714, 2999450, 3119428, 3899285, 5998900, 7798570, 15597140, 19496425, 38992850, 77985700]

約数ペア:

[(1, 77985700), (2, 38992850), (4, 19496425), (5, 15597140), (10, 7798570), (13, 5998900), (20, 3899285), (25, 3119428), (26, 2999450), (50, 1559714), (52, 1499725), (65, 1199780), (100, 779857), (130, 599890), (239, 326300), (251, 310700), (260, 299945), (325, 239956), (478, 163150), (502, 155350), (650, 119978), (956, 81575), (1004, 77675), (1195, 65260), (1255, 62140), (1300, 59989), (2390, 32630), (2510, 31070), (3107, 25100), (3263, 23900), (4780, 16315), (5020, 15535), (5975, 13052), (6214, 12550), (6275, 12428), (6526, 11950)]