21558910

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{277}}^1$

素因数の和:508

約数の個数: 32

約数和(自身を含む): 40072032

約数和(自身を除く): 18513122

約数列:

[1, 2, 5, 10, 43, 86, 181, 215, 277, 362, 430, 554, 905, 1385, 1810, 2770, 7783, 11911, 15566, 23822, 38915, 50137, 59555, 77830, 100274, 119110, 250685, 501370, 2155891, 4311782, 10779455, 21558910]

約数ペア:

[(1, 21558910), (2, 10779455), (5, 4311782), (10, 2155891), (43, 501370), (86, 250685), (181, 119110), (215, 100274), (277, 77830), (362, 59555), (430, 50137), (554, 38915), (905, 23822), (1385, 15566), (1810, 11911), (2770, 7783)]