1640207875

素因数分解:

$5^3\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{1019}}^1$

素因数の和:1276

約数の個数: 32

約数和(自身を含む): 2087654400

約数和(自身を除く): 447446525

約数列:

[1, 5, 25, 79, 125, 163, 395, 815, 1019, 1975, 4075, 5095, 9875, 12877, 20375, 25475, 64385, 80501, 127375, 166097, 321925, 402505, 830485, 1609625, 2012525, 4152425, 10062625, 13121663, 20762125, 65608315, 328041575, 1640207875]

約数ペア:

[(1, 1640207875), (5, 328041575), (25, 65608315), (79, 20762125), (125, 13121663), (163, 10062625), (395, 4152425), (815, 2012525), (1019, 1609625), (1975, 830485), (4075, 402505), (5095, 321925), (9875, 166097), (12877, 127375), (20375, 80501), (25475, 64385)]