20746640

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:256

約数の個数: 80

約数和(自身を含む): 51002688

約数和(自身を除く): 30256048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 43, 74, 80, 86, 148, 163, 172, 185, 215, 296, 326, 344, 370, 430, 592, 652, 688, 740, 815, 860, 1304, 1480, 1591, 1630, 1720, 2608, 2960, 3182, 3260, 3440, 6031, 6364, 6520, 7009, 7955, 12062, 12728, 13040, 14018, 15910, 24124, 25456, 28036, 30155, 31820, 35045, 48248, 56072, 60310, 63640, 70090, 96496, 112144, 120620, 127280, 140180, 241240, 259333, 280360, 482480, 518666, 560720, 1037332, 1296665, 2074664, 2593330, 4149328, 5186660, 10373320, 20746640]

約数ペア:

[(1, 20746640), (2, 10373320), (4, 5186660), (5, 4149328), (8, 2593330), (10, 2074664), (16, 1296665), (20, 1037332), (37, 560720), (40, 518666), (43, 482480), (74, 280360), (80, 259333), (86, 241240), (148, 140180), (163, 127280), (172, 120620), (185, 112144), (215, 96496), (296, 70090), (326, 63640), (344, 60310), (370, 56072), (430, 48248), (592, 35045), (652, 31820), (688, 30155), (740, 28036), (815, 25456), (860, 24124), (1304, 15910), (1480, 14018), (1591, 13040), (1630, 12728), (1720, 12062), (2608, 7955), (2960, 7009), (3182, 6520), (3260, 6364), (3440, 6031)]