8007280

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1105

約数の個数: 40

約数和(自身を含む): 18820224

約数和(自身を除く): 10812944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 991, 1010, 1616, 1982, 2020, 3964, 4040, 4955, 7928, 8080, 9910, 15856, 19820, 39640, 79280, 100091, 200182, 400364, 500455, 800728, 1000910, 1601456, 2001820, 4003640, 8007280]

約数ペア:

[(1, 8007280), (2, 4003640), (4, 2001820), (5, 1601456), (8, 1000910), (10, 800728), (16, 500455), (20, 400364), (40, 200182), (80, 100091), (101, 79280), (202, 39640), (404, 19820), (505, 15856), (808, 9910), (991, 8080), (1010, 7928), (1616, 4955), (1982, 4040), (2020, 3964)]