156768280

素因数分解:

$2^3\times 5^1\times {\mathrm{997}}^1\times {\mathrm{3931}}^1$

素因数の和:4939

約数の個数: 32

約数和(自身を含む): 353172240

約数和(自身を除く): 196403960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 997, 1994, 3931, 3988, 4985, 7862, 7976, 9970, 15724, 19655, 19940, 31448, 39310, 39880, 78620, 157240, 3919207, 7838414, 15676828, 19596035, 31353656, 39192070, 78384140, 156768280]

約数ペア:

[(1, 156768280), (2, 78384140), (4, 39192070), (5, 31353656), (8, 19596035), (10, 15676828), (20, 7838414), (40, 3919207), (997, 157240), (1994, 78620), (3931, 39880), (3988, 39310), (4985, 31448), (7862, 19940), (7976, 19655), (9970, 15724)]