66320440

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1663}}^1$

素因数の和:2671

約数の個数: 32

約数和(自身を含む): 149460480

約数和(自身を除く): 83140040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1663, 1994, 3326, 3988, 4985, 6652, 7976, 8315, 9970, 13304, 16630, 19940, 33260, 39880, 66520, 1658011, 3316022, 6632044, 8290055, 13264088, 16580110, 33160220, 66320440]

約数ペア:

[(1, 66320440), (2, 33160220), (4, 16580110), (5, 13264088), (8, 8290055), (10, 6632044), (20, 3316022), (40, 1658011), (997, 66520), (1663, 39880), (1994, 33260), (3326, 19940), (3988, 16630), (4985, 13304), (6652, 9970), (7976, 8315)]