21640801

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{641}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 27665064

約数和(自身を除く): 6024263

約数列:

[1, 7, 13, 49, 53, 91, 371, 637, 641, 689, 2597, 4487, 4823, 8333, 31409, 33761, 33973, 58331, 237811, 408317, 441649, 1664677, 3091543, 21640801]

約数ペア:

[(1, 21640801), (7, 3091543), (13, 1664677), (49, 441649), (53, 408317), (91, 237811), (371, 58331), (637, 33973), (641, 33761), (689, 31409), (2597, 8333), (4487, 4823)]