18668840

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4621}}^1$

素因数の和:4733

約数の個数: 32

約数和(自身を含む): 42429960

約数和(自身を除く): 23761120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4621, 9242, 18484, 23105, 36968, 46210, 92420, 184840, 466721, 933442, 1866884, 2333605, 3733768, 4667210, 9334420, 18668840]

約数ペア:

[(1, 18668840), (2, 9334420), (4, 4667210), (5, 3733768), (8, 2333605), (10, 1866884), (20, 933442), (40, 466721), (101, 184840), (202, 92420), (404, 46210), (505, 36968), (808, 23105), (1010, 18484), (2020, 9242), (4040, 4621)]