19894480

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1669}}^1$

素因数の和:1831

約数の個数: 40

約数和(自身を含む): 46593000

約数和(自身を除く): 26698520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1669, 2384, 2980, 3338, 5960, 6676, 8345, 11920, 13352, 16690, 26704, 33380, 66760, 133520, 248681, 497362, 994724, 1243405, 1989448, 2486810, 3978896, 4973620, 9947240, 19894480]

約数ペア:

[(1, 19894480), (2, 9947240), (4, 4973620), (5, 3978896), (8, 2486810), (10, 1989448), (16, 1243405), (20, 994724), (40, 497362), (80, 248681), (149, 133520), (298, 66760), (596, 33380), (745, 26704), (1192, 16690), (1490, 13352), (1669, 11920), (2384, 8345), (2980, 6676), (3338, 5960)]