123459920

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{14983}}^1$

素因数の和:15099

約数の個数: 40

約数和(自身を含む): 289850496

約数和(自身を除く): 166390576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 4120, 8240, 14983, 29966, 59932, 74915, 119864, 149830, 239728, 299660, 599320, 1198640, 1543249, 3086498, 6172996, 7716245, 12345992, 15432490, 24691984, 30864980, 61729960, 123459920]

約数ペア:

[(1, 123459920), (2, 61729960), (4, 30864980), (5, 24691984), (8, 15432490), (10, 12345992), (16, 7716245), (20, 6172996), (40, 3086498), (80, 1543249), (103, 1198640), (206, 599320), (412, 299660), (515, 239728), (824, 149830), (1030, 119864), (1648, 74915), (2060, 59932), (4120, 29966), (8240, 14983)]