18656720

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2309}}^1$

素因数の和:2423

約数の個数: 40

約数和(自身を含む): 43825320

約数和(自身を除く): 25168600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2309, 4040, 4618, 8080, 9236, 11545, 18472, 23090, 36944, 46180, 92360, 184720, 233209, 466418, 932836, 1166045, 1865672, 2332090, 3731344, 4664180, 9328360, 18656720]

約数ペア:

[(1, 18656720), (2, 9328360), (4, 4664180), (5, 3731344), (8, 2332090), (10, 1865672), (16, 1166045), (20, 932836), (40, 466418), (80, 233209), (101, 184720), (202, 92360), (404, 46180), (505, 36944), (808, 23090), (1010, 18472), (1616, 11545), (2020, 9236), (2309, 8080), (4040, 4618)]