21259415

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1621}}^1$

素因数の和:1730

約数の個数: 16

約数和(自身を含む): 26548896

約数和(自身を除く): 5289481

約数列:

[1, 5, 43, 61, 215, 305, 1621, 2623, 8105, 13115, 69703, 98881, 348515, 494405, 4251883, 21259415]

約数ペア:

[(1, 21259415), (5, 4251883), (43, 494405), (61, 348515), (215, 98881), (305, 69703), (1621, 13115), (2623, 8105)]