8487980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1091}}^1$

素因数の和:1489

約数の個数: 24

約数和(自身を含む): 17886960

約数和(自身を除く): 9398980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1091, 1556, 1945, 2182, 3890, 4364, 5455, 7780, 10910, 21820, 424399, 848798, 1697596, 2121995, 4243990, 8487980]

約数ペア:

[(1, 8487980), (2, 4243990), (4, 2121995), (5, 1697596), (10, 848798), (20, 424399), (389, 21820), (778, 10910), (1091, 7780), (1556, 5455), (1945, 4364), (2182, 3890)]