2499440

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:369

約数の個数: 40

約数和(自身を含む): 5877600

約数和(自身を除く): 3378160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 199, 314, 398, 628, 785, 796, 995, 1256, 1570, 1592, 1990, 2512, 3140, 3184, 3980, 6280, 7960, 12560, 15920, 31243, 62486, 124972, 156215, 249944, 312430, 499888, 624860, 1249720, 2499440]

約数ペア:

[(1, 2499440), (2, 1249720), (4, 624860), (5, 499888), (8, 312430), (10, 249944), (16, 156215), (20, 124972), (40, 62486), (80, 31243), (157, 15920), (199, 12560), (314, 7960), (398, 6280), (628, 3980), (785, 3184), (796, 3140), (995, 2512), (1256, 1990), (1570, 1592)]