20159585

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{421}}^1$

素因数の和:644

約数の個数: 16

約数和(自身を含む): 24803472

約数和(自身を除く): 4643887

約数列:

[1, 5, 61, 157, 305, 421, 785, 2105, 9577, 25681, 47885, 66097, 128405, 330485, 4031917, 20159585]

約数ペア:

[(1, 20159585), (5, 4031917), (61, 330485), (157, 128405), (305, 66097), (421, 47885), (785, 25681), (2105, 9577)]