18998120

素因数分解:

$2^3\times 5^1\times {\mathrm{293}}^1\times {\mathrm{1621}}^1$

素因数の和:1925

約数の個数: 32

約数和(自身を含む): 42918120

約数和(自身を除く): 23920000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 293, 586, 1172, 1465, 1621, 2344, 2930, 3242, 5860, 6484, 8105, 11720, 12968, 16210, 32420, 64840, 474953, 949906, 1899812, 2374765, 3799624, 4749530, 9499060, 18998120]

約数ペア:

[(1, 18998120), (2, 9499060), (4, 4749530), (5, 3799624), (8, 2374765), (10, 1899812), (20, 949906), (40, 474953), (293, 64840), (586, 32420), (1172, 16210), (1465, 12968), (1621, 11720), (2344, 8105), (2930, 6484), (3242, 5860)]