18916760

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8923}}^1$

素因数の和:8987

約数の個数: 32

約数和(自身を含む): 43370640

約数和(自身を除く): 24453880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 8923, 17846, 35692, 44615, 71384, 89230, 178460, 356920, 472919, 945838, 1891676, 2364595, 3783352, 4729190, 9458380, 18916760]

約数ペア:

[(1, 18916760), (2, 9458380), (4, 4729190), (5, 3783352), (8, 2364595), (10, 1891676), (20, 945838), (40, 472919), (53, 356920), (106, 178460), (212, 89230), (265, 71384), (424, 44615), (530, 35692), (1060, 17846), (2120, 8923)]