21942505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3793}}^1$

素因数の和:3900

約数の個数: 16

約数和(自身を含む): 28682640

約数和(自身を除く): 6740135

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3793, 5785, 18965, 49309, 246545, 337577, 1687885, 4388501, 21942505]

約数ペア:

[(1, 21942505), (5, 4388501), (13, 1687885), (65, 337577), (89, 246545), (445, 49309), (1157, 18965), (3793, 5785)]