21263216

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{677}}^1$

素因数の和:849

約数の個数: 40

約数和(自身を含む): 44726304

約数和(自身を除く): 23463088

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 151, 208, 302, 604, 677, 1208, 1354, 1963, 2416, 2708, 3926, 5416, 7852, 8801, 10832, 15704, 17602, 31408, 35204, 70408, 102227, 140816, 204454, 408908, 817816, 1328951, 1635632, 2657902, 5315804, 10631608, 21263216]

約数ペア:

[(1, 21263216), (2, 10631608), (4, 5315804), (8, 2657902), (13, 1635632), (16, 1328951), (26, 817816), (52, 408908), (104, 204454), (151, 140816), (208, 102227), (302, 70408), (604, 35204), (677, 31408), (1208, 17602), (1354, 15704), (1963, 10832), (2416, 8801), (2708, 7852), (3926, 5416)]