20466640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:280

約数の個数: 80

約数和(自身を含む): 51224400

約数和(自身を除く): 30757760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 101, 136, 149, 170, 202, 272, 298, 340, 404, 505, 596, 680, 745, 808, 1010, 1192, 1360, 1490, 1616, 1717, 2020, 2384, 2533, 2980, 3434, 4040, 5066, 5960, 6868, 8080, 8585, 10132, 11920, 12665, 13736, 15049, 17170, 20264, 25330, 27472, 30098, 34340, 40528, 50660, 60196, 68680, 75245, 101320, 120392, 137360, 150490, 202640, 240784, 255833, 300980, 511666, 601960, 1023332, 1203920, 1279165, 2046664, 2558330, 4093328, 5116660, 10233320, 20466640]

約数ペア:

[(1, 20466640), (2, 10233320), (4, 5116660), (5, 4093328), (8, 2558330), (10, 2046664), (16, 1279165), (17, 1203920), (20, 1023332), (34, 601960), (40, 511666), (68, 300980), (80, 255833), (85, 240784), (101, 202640), (136, 150490), (149, 137360), (170, 120392), (202, 101320), (272, 75245), (298, 68680), (340, 60196), (404, 50660), (505, 40528), (596, 34340), (680, 30098), (745, 27472), (808, 25330), (1010, 20264), (1192, 17170), (1360, 15049), (1490, 13736), (1616, 12665), (1717, 11920), (2020, 10132), (2384, 8585), (2533, 8080), (2980, 6868), (3434, 5960), (4040, 5066)]