17942420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21881}}^1$

素因数の和:21931

約数の個数: 24

約数和(自身を含む): 38599848

約数和(自身を除く): 20657428

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 21881, 43762, 87524, 109405, 218810, 437620, 897121, 1794242, 3588484, 4485605, 8971210, 17942420]

約数ペア:

[(1, 17942420), (2, 8971210), (4, 4485605), (5, 3588484), (10, 1794242), (20, 897121), (41, 437620), (82, 218810), (164, 109405), (205, 87524), (410, 43762), (820, 21881)]