1815691340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{499}}^1\times {\mathrm{4231}}^1$

素因数の和:4782

約数の個数: 48

約数和(自身を含む): 3910368000

約数和(自身を除く): 2094676660

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 499, 860, 998, 1996, 2495, 4231, 4990, 8462, 9980, 16924, 21155, 21457, 42310, 42914, 84620, 85828, 107285, 181933, 214570, 363866, 429140, 727732, 909665, 1819330, 2111269, 3638660, 4222538, 8445076, 10556345, 21112690, 42225380, 90784567, 181569134, 363138268, 453922835, 907845670, 1815691340]

約数ペア:

[(1, 1815691340), (2, 907845670), (4, 453922835), (5, 363138268), (10, 181569134), (20, 90784567), (43, 42225380), (86, 21112690), (172, 10556345), (215, 8445076), (430, 4222538), (499, 3638660), (860, 2111269), (998, 1819330), (1996, 909665), (2495, 727732), (4231, 429140), (4990, 363866), (8462, 214570), (9980, 181933), (16924, 107285), (21155, 85828), (21457, 84620), (42310, 42914)]