21920045

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{10267}}^1$

素因数の和:10340

約数の個数: 16

約数和(自身を含む): 30557568

約数和(自身を除く): 8637523

約数列:

[1, 5, 7, 35, 61, 305, 427, 2135, 10267, 51335, 71869, 359345, 626287, 3131435, 4384009, 21920045]

約数ペア:

[(1, 21920045), (5, 4384009), (7, 3131435), (35, 626287), (61, 359345), (305, 71869), (427, 51335), (2135, 10267)]