21286390

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{40163}}^1$

素因数の和:40223

約数の個数: 16

約数和(自身を含む): 39039408

約数和(自身を除く): 17753018

約数列:

[1, 2, 5, 10, 53, 106, 265, 530, 40163, 80326, 200815, 401630, 2128639, 4257278, 10643195, 21286390]

約数ペア:

[(1, 21286390), (2, 10643195), (5, 4257278), (10, 2128639), (53, 401630), (106, 200815), (265, 80326), (530, 40163)]