128837620

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{63781}}^1$

素因数の和:63891

約数の個数: 24

約数和(自身を含む): 273242088

約数和(自身を除く): 144404468

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 63781, 127562, 255124, 318905, 637810, 1275620, 6441881, 12883762, 25767524, 32209405, 64418810, 128837620]

約数ペア:

[(1, 128837620), (2, 64418810), (4, 32209405), (5, 25767524), (10, 12883762), (20, 6441881), (101, 1275620), (202, 637810), (404, 318905), (505, 255124), (1010, 127562), (2020, 63781)]