28025480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1110

約数の個数: 64

約数和(自身を含む): 72852480

約数和(自身を除く): 44827000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 101, 140, 202, 280, 404, 505, 707, 808, 991, 1010, 1414, 1982, 2020, 2828, 3535, 3964, 4040, 4955, 5656, 6937, 7070, 7928, 9910, 13874, 14140, 19820, 27748, 28280, 34685, 39640, 55496, 69370, 100091, 138740, 200182, 277480, 400364, 500455, 700637, 800728, 1000910, 1401274, 2001820, 2802548, 3503185, 4003640, 5605096, 7006370, 14012740, 28025480]

約数ペア:

[(1, 28025480), (2, 14012740), (4, 7006370), (5, 5605096), (7, 4003640), (8, 3503185), (10, 2802548), (14, 2001820), (20, 1401274), (28, 1000910), (35, 800728), (40, 700637), (56, 500455), (70, 400364), (101, 277480), (140, 200182), (202, 138740), (280, 100091), (404, 69370), (505, 55496), (707, 39640), (808, 34685), (991, 28280), (1010, 27748), (1414, 19820), (1982, 14140), (2020, 13874), (2828, 9910), (3535, 7928), (3964, 7070), (4040, 6937), (4955, 5656)]