21557168

素因数分解:

$2^4\times {\mathrm{509}}^1\times {\mathrm{2647}}^1$

素因数の和:3164

約数の個数: 20

約数和(自身を含む): 41864880

約数和(自身を除く): 20307712

約数列:

[1, 2, 4, 8, 16, 509, 1018, 2036, 2647, 4072, 5294, 8144, 10588, 21176, 42352, 1347323, 2694646, 5389292, 10778584, 21557168]

約数ペア:

[(1, 21557168), (2, 10778584), (4, 5389292), (8, 2694646), (16, 1347323), (509, 42352), (1018, 21176), (2036, 10588), (2647, 8144), (4072, 5294)]