21866180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{313}}^1\times {\mathrm{499}}^1$

素因数の和:828

約数の個数: 48

約数和(自身を含む): 52752000

約数和(自身を除く): 30885820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 313, 499, 626, 998, 1252, 1565, 1996, 2191, 2495, 3130, 3493, 4382, 4990, 6260, 6986, 8764, 9980, 10955, 13972, 17465, 21910, 34930, 43820, 69860, 156187, 312374, 624748, 780935, 1093309, 1561870, 2186618, 3123740, 4373236, 5466545, 10933090, 21866180]

約数ペア:

[(1, 21866180), (2, 10933090), (4, 5466545), (5, 4373236), (7, 3123740), (10, 2186618), (14, 1561870), (20, 1093309), (28, 780935), (35, 624748), (70, 312374), (140, 156187), (313, 69860), (499, 43820), (626, 34930), (998, 21910), (1252, 17465), (1565, 13972), (1996, 10955), (2191, 9980), (2495, 8764), (3130, 6986), (3493, 6260), (4382, 4990)]