127788820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{2609}}^1$

素因数の和:2728

約数の個数: 48

約数和(自身を含む): 280627200

約数和(自身を除く): 152838380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 79, 124, 155, 158, 310, 316, 395, 620, 790, 1580, 2449, 2609, 4898, 5218, 9796, 10436, 12245, 13045, 24490, 26090, 48980, 52180, 80879, 161758, 206111, 323516, 404395, 412222, 808790, 824444, 1030555, 1617580, 2061110, 4122220, 6389441, 12778882, 25557764, 31947205, 63894410, 127788820]

約数ペア:

[(1, 127788820), (2, 63894410), (4, 31947205), (5, 25557764), (10, 12778882), (20, 6389441), (31, 4122220), (62, 2061110), (79, 1617580), (124, 1030555), (155, 824444), (158, 808790), (310, 412222), (316, 404395), (395, 323516), (620, 206111), (790, 161758), (1580, 80879), (2449, 52180), (2609, 48980), (4898, 26090), (5218, 24490), (9796, 13045), (10436, 12245)]