638961890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{80779}}^1$

素因数の和:80906

約数の個数: 32

約数和(自身を含む): 1326084480

約数和(自身を除く): 687122590

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 113, 226, 565, 791, 1130, 1582, 3955, 7910, 80779, 161558, 403895, 565453, 807790, 1130906, 2827265, 5654530, 9128027, 18256054, 45640135, 63896189, 91280270, 127792378, 319480945, 638961890]

約数ペア:

[(1, 638961890), (2, 319480945), (5, 127792378), (7, 91280270), (10, 63896189), (14, 45640135), (35, 18256054), (70, 9128027), (113, 5654530), (226, 2827265), (565, 1130906), (791, 807790), (1130, 565453), (1582, 403895), (3955, 161558), (7910, 80779)]