20859865

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{5261}}^1$

素因数の和:5340

約数の個数: 16

約数和(自身を含む): 27404496

約数和(自身を除く): 6544631

約数列:

[1, 5, 13, 61, 65, 305, 793, 3965, 5261, 26305, 68393, 320921, 341965, 1604605, 4171973, 20859865]

約数ペア:

[(1, 20859865), (5, 4171973), (13, 1604605), (61, 341965), (65, 320921), (305, 68393), (793, 26305), (3965, 5261)]