21666537

素因数分解:

$3^2\times {\mathrm{107}}^1\times {\mathrm{149}}^1\times {\mathrm{151}}^1$

素因数の和:413

約数の個数: 24

約数和(自身を含む): 32011200

約数和(自身を除く): 10344663

約数列:

[1, 3, 9, 107, 149, 151, 321, 447, 453, 963, 1341, 1359, 15943, 16157, 22499, 47829, 48471, 67497, 143487, 145413, 202491, 2407393, 7222179, 21666537]

約数ペア:

[(1, 21666537), (3, 7222179), (9, 2407393), (107, 202491), (149, 145413), (151, 143487), (321, 67497), (447, 48471), (453, 47829), (963, 22499), (1341, 16157), (1359, 15943)]