21207403

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{839}}^1$

素因数の和:1026

約数の個数: 16

約数和(自身を含む): 25482240

約数和(自身を除く): 4274837

約数列:

[1, 7, 23, 157, 161, 839, 1099, 3611, 5873, 19297, 25277, 131723, 135079, 922061, 3029629, 21207403]

約数ペア:

[(1, 21207403), (7, 3029629), (23, 922061), (157, 135079), (161, 131723), (839, 25277), (1099, 19297), (3611, 5873)]