79979720

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{4007}}^1$

素因数の和:4517

約数の個数: 32

約数和(自身を含む): 180360000

約数和(自身を除く): 100380280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1996, 2495, 3992, 4007, 4990, 8014, 9980, 16028, 19960, 20035, 32056, 40070, 80140, 160280, 1999493, 3998986, 7997972, 9997465, 15995944, 19994930, 39989860, 79979720]

約数ペア:

[(1, 79979720), (2, 39989860), (4, 19994930), (5, 15995944), (8, 9997465), (10, 7997972), (20, 3998986), (40, 1999493), (499, 160280), (998, 80140), (1996, 40070), (2495, 32056), (3992, 20035), (4007, 19960), (4990, 16028), (8014, 9980)]