28572740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{499}}^1$

素因数の和:924

約数の個数: 48

約数和(自身を含む): 68880000

約数和(自身を除く): 40307260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 409, 499, 818, 998, 1636, 1996, 2045, 2495, 2863, 3493, 4090, 4990, 5726, 6986, 8180, 9980, 11452, 13972, 14315, 17465, 28630, 34930, 57260, 69860, 204091, 408182, 816364, 1020455, 1428637, 2040910, 2857274, 4081820, 5714548, 7143185, 14286370, 28572740]

約数ペア:

[(1, 28572740), (2, 14286370), (4, 7143185), (5, 5714548), (7, 4081820), (10, 2857274), (14, 2040910), (20, 1428637), (28, 1020455), (35, 816364), (70, 408182), (140, 204091), (409, 69860), (499, 57260), (818, 34930), (998, 28630), (1636, 17465), (1996, 14315), (2045, 13972), (2495, 11452), (2863, 9980), (3493, 8180), (4090, 6986), (4990, 5726)]