9991480

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:248

約数の個数: 64

約数和(自身を含む): 23775840

約数和(自身を除く): 13784360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 43, 74, 86, 148, 157, 172, 185, 215, 296, 314, 344, 370, 430, 628, 740, 785, 860, 1256, 1480, 1570, 1591, 1720, 3140, 3182, 5809, 6280, 6364, 6751, 7955, 11618, 12728, 13502, 15910, 23236, 27004, 29045, 31820, 33755, 46472, 54008, 58090, 63640, 67510, 116180, 135020, 232360, 249787, 270040, 499574, 999148, 1248935, 1998296, 2497870, 4995740, 9991480]

約数ペア:

[(1, 9991480), (2, 4995740), (4, 2497870), (5, 1998296), (8, 1248935), (10, 999148), (20, 499574), (37, 270040), (40, 249787), (43, 232360), (74, 135020), (86, 116180), (148, 67510), (157, 63640), (172, 58090), (185, 54008), (215, 46472), (296, 33755), (314, 31820), (344, 29045), (370, 27004), (430, 23236), (628, 15910), (740, 13502), (785, 12728), (860, 11618), (1256, 7955), (1480, 6751), (1570, 6364), (1591, 6280), (1720, 5809), (3140, 3182)]