19974160

素因数分解:

$2^4\times 5^1\times {\mathrm{249677}}^1$

素因数の和:249690

約数の個数: 20

約数和(自身を含む): 46440108

約数和(自身を除く): 26465948

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249677, 499354, 998708, 1248385, 1997416, 2496770, 3994832, 4993540, 9987080, 19974160]

約数ペア:

[(1, 19974160), (2, 9987080), (4, 4993540), (5, 3994832), (8, 2496770), (10, 1997416), (16, 1248385), (20, 998708), (40, 499354), (80, 249677)]