128749820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207661}}^1$

素因数の和:207701

約数の個数: 24

約数和(自身を含む): 279097728

約数和(自身を除く): 150347908

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207661, 415322, 830644, 1038305, 2076610, 4153220, 6437491, 12874982, 25749964, 32187455, 64374910, 128749820]

約数ペア:

[(1, 128749820), (2, 64374910), (4, 32187455), (5, 25749964), (10, 12874982), (20, 6437491), (31, 4153220), (62, 2076610), (124, 1038305), (155, 830644), (310, 415322), (620, 207661)]