25107440

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1999}}^1$

素因数の和:2169

約数の個数: 40

約数和(自身を含む): 58776000

約数和(自身を除く): 33668560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1999, 2512, 3140, 3998, 6280, 7996, 9995, 12560, 15992, 19990, 31984, 39980, 79960, 159920, 313843, 627686, 1255372, 1569215, 2510744, 3138430, 5021488, 6276860, 12553720, 25107440]

約数ペア:

[(1, 25107440), (2, 12553720), (4, 6276860), (5, 5021488), (8, 3138430), (10, 2510744), (16, 1569215), (20, 1255372), (40, 627686), (80, 313843), (157, 159920), (314, 79960), (628, 39980), (785, 31984), (1256, 19990), (1570, 15992), (1999, 12560), (2512, 9995), (3140, 7996), (3998, 6280)]