64894520

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{16063}}^1$

素因数の和:16175

約数の個数: 32

約数和(自身を含む): 147467520

約数和(自身を除く): 82573000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 16063, 32126, 64252, 80315, 128504, 160630, 321260, 642520, 1622363, 3244726, 6489452, 8111815, 12978904, 16223630, 32447260, 64894520]

約数ペア:

[(1, 64894520), (2, 32447260), (4, 16223630), (5, 12978904), (8, 8111815), (10, 6489452), (20, 3244726), (40, 1622363), (101, 642520), (202, 321260), (404, 160630), (505, 128504), (808, 80315), (1010, 64252), (2020, 32126), (4040, 16063)]