21385553

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{977}}^1$

素因数の和:1096

約数の個数: 16

約数和(自身を含む): 25349760

約数和(自身を除く): 3964207

約数列:

[1, 7, 53, 59, 371, 413, 977, 3127, 6839, 21889, 51781, 57643, 362467, 403501, 3055079, 21385553]

約数ペア:

[(1, 21385553), (7, 3055079), (53, 403501), (59, 362467), (371, 57643), (413, 51781), (977, 21889), (3127, 6839)]