21000613928

素因数分解:

$2^3\times 7^1\times {\mathrm{17987}}^1\times {\mathrm{20849}}^1$

素因数の和:38849

約数の個数: 32

約数和(自身を含む): 45005976000

約数和(自身を除く): 24005362072

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 17987, 20849, 35974, 41698, 71948, 83396, 125909, 143896, 145943, 166792, 251818, 291886, 503636, 583772, 1007272, 1167544, 375010963, 750021926, 1500043852, 2625076741, 3000087704, 5250153482, 10500306964, 21000613928]

約数ペア:

[(1, 21000613928), (2, 10500306964), (4, 5250153482), (7, 3000087704), (8, 2625076741), (14, 1500043852), (28, 750021926), (56, 375010963), (17987, 1167544), (20849, 1007272), (35974, 583772), (41698, 503636), (71948, 291886), (83396, 251818), (125909, 166792), (143896, 145943)]