21362420

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1301}}^1$

素因数の和:2131

約数の個数: 24

約数和(自身を含む): 44950248

約数和(自身を除く): 23587828

約数列:

[1, 2, 4, 5, 10, 20, 821, 1301, 1642, 2602, 3284, 4105, 5204, 6505, 8210, 13010, 16420, 26020, 1068121, 2136242, 4272484, 5340605, 10681210, 21362420]

約数ペア:

[(1, 21362420), (2, 10681210), (4, 5340605), (5, 4272484), (10, 2136242), (20, 1068121), (821, 26020), (1301, 16420), (1642, 13010), (2602, 8210), (3284, 6505), (4105, 5204)]