21155240

素因数分解:

$2^3\times 5^1\times {\mathrm{528881}}^1$

素因数の和:528892

約数の個数: 16

約数和(自身を含む): 47599380

約数和(自身を除く): 26444140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528881, 1057762, 2115524, 2644405, 4231048, 5288810, 10577620, 21155240]

約数ペア:

[(1, 21155240), (2, 10577620), (4, 5288810), (5, 4231048), (8, 2644405), (10, 2115524), (20, 1057762), (40, 528881)]