18821680

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1579}}^1$

素因数の和:1741

約数の個数: 40

約数和(自身を含む): 44082000

約数和(自身を除く): 25260320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1579, 2384, 2980, 3158, 5960, 6316, 7895, 11920, 12632, 15790, 25264, 31580, 63160, 126320, 235271, 470542, 941084, 1176355, 1882168, 2352710, 3764336, 4705420, 9410840, 18821680]

約数ペア:

[(1, 18821680), (2, 9410840), (4, 4705420), (5, 3764336), (8, 2352710), (10, 1882168), (16, 1176355), (20, 941084), (40, 470542), (80, 235271), (149, 126320), (298, 63160), (596, 31580), (745, 25264), (1192, 15790), (1490, 12632), (1579, 11920), (2384, 7895), (2980, 6316), (3158, 5960)]