20980505

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{3547}}^1$

素因数の和:3585

約数の個数: 24

約数和(自身を含む): 31165632

約数和(自身を除く): 10185127

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 455, 845, 1183, 3547, 5915, 17735, 24829, 46111, 124145, 230555, 322777, 599443, 1613885, 2997215, 4196101, 20980505]

約数ペア:

[(1, 20980505), (5, 4196101), (7, 2997215), (13, 1613885), (35, 599443), (65, 322777), (91, 230555), (169, 124145), (455, 46111), (845, 24829), (1183, 17735), (3547, 5915)]