21243556

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{2557}}^1$

素因数の和:2659

約数の個数: 24

約数和(自身を含む): 38963456

約数和(自身を除く): 17719900

約数列:

[1, 2, 4, 31, 62, 67, 124, 134, 268, 2077, 2557, 4154, 5114, 8308, 10228, 79267, 158534, 171319, 317068, 342638, 685276, 5310889, 10621778, 21243556]

約数ペア:

[(1, 21243556), (2, 10621778), (4, 5310889), (31, 685276), (62, 342638), (67, 317068), (124, 171319), (134, 158534), (268, 79267), (2077, 10228), (2557, 8308), (4154, 5114)]