18709240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{421}}^1$

素因数の和:544

約数の個数: 64

約数和(自身を含む): 46487520

約数和(自身を除く): 27778280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 101, 110, 202, 220, 404, 421, 440, 505, 808, 842, 1010, 1111, 1684, 2020, 2105, 2222, 3368, 4040, 4210, 4444, 4631, 5555, 8420, 8888, 9262, 11110, 16840, 18524, 22220, 23155, 37048, 42521, 44440, 46310, 85042, 92620, 170084, 185240, 212605, 340168, 425210, 467731, 850420, 935462, 1700840, 1870924, 2338655, 3741848, 4677310, 9354620, 18709240]

約数ペア:

[(1, 18709240), (2, 9354620), (4, 4677310), (5, 3741848), (8, 2338655), (10, 1870924), (11, 1700840), (20, 935462), (22, 850420), (40, 467731), (44, 425210), (55, 340168), (88, 212605), (101, 185240), (110, 170084), (202, 92620), (220, 85042), (404, 46310), (421, 44440), (440, 42521), (505, 37048), (808, 23155), (842, 22220), (1010, 18524), (1111, 16840), (1684, 11110), (2020, 9262), (2105, 8888), (2222, 8420), (3368, 5555), (4040, 4631), (4210, 4444)]