21990236

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{293}}^1\times {\mathrm{647}}^1$

素因数の和:973

約数の個数: 24

約数和(自身を含む): 40007520

約数和(自身を除く): 18017284

約数列:

[1, 2, 4, 29, 58, 116, 293, 586, 647, 1172, 1294, 2588, 8497, 16994, 18763, 33988, 37526, 75052, 189571, 379142, 758284, 5497559, 10995118, 21990236]

約数ペア:

[(1, 21990236), (2, 10995118), (4, 5497559), (29, 758284), (58, 379142), (116, 189571), (293, 75052), (586, 37526), (647, 33988), (1172, 18763), (1294, 16994), (2588, 8497)]