21712535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{17581}}^1$

素因数の和:17618

約数の個数: 16

約数和(自身を含む): 29537760

約数和(自身を除く): 7825225

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 17581, 87905, 228553, 334039, 1142765, 1670195, 4342507, 21712535]

約数ペア:

[(1, 21712535), (5, 4342507), (13, 1670195), (19, 1142765), (65, 334039), (95, 228553), (247, 87905), (1235, 17581)]