21897109

素因数分解:

${\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 24467184

約数和(自身を除く): 2570075

約数列:

[1, 13, 53, 61, 521, 689, 793, 3233, 6773, 27613, 31781, 42029, 358969, 413153, 1684393, 21897109]

約数ペア:

[(1, 21897109), (13, 1684393), (53, 413153), (61, 358969), (521, 42029), (689, 31781), (793, 27613), (3233, 6773)]