123977980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{443}}^1\times {\mathrm{1999}}^1$

素因数の和:2458

約数の個数: 48

約数和(自身を含む): 298368000

約数和(自身を除く): 174390020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 443, 886, 1772, 1999, 2215, 3101, 3998, 4430, 6202, 7996, 8860, 9995, 12404, 13993, 15505, 19990, 27986, 31010, 39980, 55972, 62020, 69965, 139930, 279860, 885557, 1771114, 3542228, 4427785, 6198899, 8855570, 12397798, 17711140, 24795596, 30994495, 61988990, 123977980]

約数ペア:

[(1, 123977980), (2, 61988990), (4, 30994495), (5, 24795596), (7, 17711140), (10, 12397798), (14, 8855570), (20, 6198899), (28, 4427785), (35, 3542228), (70, 1771114), (140, 885557), (443, 279860), (886, 139930), (1772, 69965), (1999, 62020), (2215, 55972), (3101, 39980), (3998, 31010), (4430, 27986), (6202, 19990), (7996, 15505), (8860, 13993), (9995, 12404)]