21087716

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{9431}}^1$

素因数の和:9491

約数の個数: 24

約数和(自身を含む): 40670784

約数和(自身を除く): 19583068

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 559, 1118, 2236, 9431, 18862, 37724, 122603, 245206, 405533, 490412, 811066, 1622132, 5271929, 10543858, 21087716]

約数ペア:

[(1, 21087716), (2, 10543858), (4, 5271929), (13, 1622132), (26, 811066), (43, 490412), (52, 405533), (86, 245206), (172, 122603), (559, 37724), (1118, 18862), (2236, 9431)]