21541779

素因数分解:

$3^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{3137}}^1$

素因数の和:3259

約数の個数: 24

約数和(自身を含む): 35898720

約数和(自身を除く): 14356941

約数列:

[1, 3, 7, 9, 21, 63, 109, 327, 763, 981, 2289, 3137, 6867, 9411, 21959, 28233, 65877, 197631, 341933, 1025799, 2393531, 3077397, 7180593, 21541779]

約数ペア:

[(1, 21541779), (3, 7180593), (7, 3077397), (9, 2393531), (21, 1025799), (63, 341933), (109, 197631), (327, 65877), (763, 28233), (981, 21959), (2289, 9411), (3137, 6867)]