21353180

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7681}}^1$

素因数の和:7829

約数の個数: 24

約数和(自身を含む): 45170160

約数和(自身を除く): 23816980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7681, 15362, 30724, 38405, 76810, 153620, 1067659, 2135318, 4270636, 5338295, 10676590, 21353180]

約数ペア:

[(1, 21353180), (2, 10676590), (4, 5338295), (5, 4270636), (10, 2135318), (20, 1067659), (139, 153620), (278, 76810), (556, 38405), (695, 30724), (1390, 15362), (2780, 7681)]