21726460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{499}}^1$

素因数の和:826

約数の個数: 48

約数和(自身を含む): 52416000

約数和(自身を除く): 30689540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 311, 499, 622, 998, 1244, 1555, 1996, 2177, 2495, 3110, 3493, 4354, 4990, 6220, 6986, 8708, 9980, 10885, 13972, 17465, 21770, 34930, 43540, 69860, 155189, 310378, 620756, 775945, 1086323, 1551890, 2172646, 3103780, 4345292, 5431615, 10863230, 21726460]

約数ペア:

[(1, 21726460), (2, 10863230), (4, 5431615), (5, 4345292), (7, 3103780), (10, 2172646), (14, 1551890), (20, 1086323), (28, 775945), (35, 620756), (70, 310378), (140, 155189), (311, 69860), (499, 43540), (622, 34930), (998, 21770), (1244, 17465), (1555, 13972), (1996, 10885), (2177, 9980), (2495, 8708), (3110, 6986), (3493, 6220), (4354, 4990)]