21609790

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{69709}}^1$

素因数の和:69747

約数の個数: 16

約数和(自身を含む): 40152960

約数和(自身を除く): 18543170

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 69709, 139418, 348545, 697090, 2160979, 4321958, 10804895, 21609790]

約数ペア:

[(1, 21609790), (2, 10804895), (5, 4321958), (10, 2160979), (31, 697090), (62, 348545), (155, 139418), (310, 69709)]