1997980

素因数分解:

$2^2\times 5^1\times {\mathrm{283}}^1\times {\mathrm{353}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 4222512

約数和(自身を除く): 2224532

約数列:

[1, 2, 4, 5, 10, 20, 283, 353, 566, 706, 1132, 1412, 1415, 1765, 2830, 3530, 5660, 7060, 99899, 199798, 399596, 499495, 998990, 1997980]

約数ペア:

[(1, 1997980), (2, 998990), (4, 499495), (5, 399596), (10, 199798), (20, 99899), (283, 7060), (353, 5660), (566, 3530), (706, 2830), (1132, 1765), (1412, 1415)]