19809985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8237}}^1$

素因数の和:8292

約数の個数: 16

約数和(自身を含む): 26295696

約数和(自身を除く): 6485711

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8237, 41185, 107081, 304769, 535405, 1523845, 3961997, 19809985]

約数ペア:

[(1, 19809985), (5, 3961997), (13, 1523845), (37, 535405), (65, 304769), (185, 107081), (481, 41185), (2405, 8237)]