20400335

素因数分解:

$5^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 24948000

約数和(自身を除く): 4547665

約数列:

[1, 5, 139, 149, 197, 695, 745, 985, 20711, 27383, 29353, 103555, 136915, 146765, 4080067, 20400335]

約数ペア:

[(1, 20400335), (5, 4080067), (139, 146765), (149, 136915), (197, 103555), (695, 29353), (745, 27383), (985, 20711)]