21703521

素因数分解:

$3^1\times 7^2\times {\mathrm{191}}^1\times {\mathrm{773}}^1$

素因数の和:981

約数の個数: 24

約数和(自身を含む): 33882624

約数和(自身を除く): 12179103

約数列:

[1, 3, 7, 21, 49, 147, 191, 573, 773, 1337, 2319, 4011, 5411, 9359, 16233, 28077, 37877, 113631, 147643, 442929, 1033501, 3100503, 7234507, 21703521]

約数ペア:

[(1, 21703521), (3, 7234507), (7, 3100503), (21, 1033501), (49, 442929), (147, 147643), (191, 113631), (573, 37877), (773, 28077), (1337, 16233), (2319, 9359), (4011, 5411)]