19982960

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:250

約数の個数: 80

約数和(自身を含む): 49136736

約数和(自身を除く): 29153776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 43, 74, 80, 86, 148, 157, 172, 185, 215, 296, 314, 344, 370, 430, 592, 628, 688, 740, 785, 860, 1256, 1480, 1570, 1591, 1720, 2512, 2960, 3140, 3182, 3440, 5809, 6280, 6364, 6751, 7955, 11618, 12560, 12728, 13502, 15910, 23236, 25456, 27004, 29045, 31820, 33755, 46472, 54008, 58090, 63640, 67510, 92944, 108016, 116180, 127280, 135020, 232360, 249787, 270040, 464720, 499574, 540080, 999148, 1248935, 1998296, 2497870, 3996592, 4995740, 9991480, 19982960]

約数ペア:

[(1, 19982960), (2, 9991480), (4, 4995740), (5, 3996592), (8, 2497870), (10, 1998296), (16, 1248935), (20, 999148), (37, 540080), (40, 499574), (43, 464720), (74, 270040), (80, 249787), (86, 232360), (148, 135020), (157, 127280), (172, 116180), (185, 108016), (215, 92944), (296, 67510), (314, 63640), (344, 58090), (370, 54008), (430, 46472), (592, 33755), (628, 31820), (688, 29045), (740, 27004), (785, 25456), (860, 23236), (1256, 15910), (1480, 13502), (1570, 12728), (1591, 12560), (1720, 11618), (2512, 7955), (2960, 6751), (3140, 6364), (3182, 6280), (3440, 5809)]