20355555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:232

約数の個数: 64

約数和(自身を含む): 38522880

約数和(自身を除く): 18167325

約数列:

[1, 3, 5, 11, 15, 19, 33, 43, 55, 57, 95, 129, 151, 165, 209, 215, 285, 453, 473, 627, 645, 755, 817, 1045, 1419, 1661, 2265, 2365, 2451, 2869, 3135, 4085, 4983, 6493, 7095, 8305, 8607, 8987, 12255, 14345, 19479, 24915, 26961, 31559, 32465, 43035, 44935, 71423, 94677, 97395, 123367, 134805, 157795, 214269, 357115, 370101, 473385, 616835, 1071345, 1357037, 1850505, 4071111, 6785185, 20355555]

約数ペア:

[(1, 20355555), (3, 6785185), (5, 4071111), (11, 1850505), (15, 1357037), (19, 1071345), (33, 616835), (43, 473385), (55, 370101), (57, 357115), (95, 214269), (129, 157795), (151, 134805), (165, 123367), (209, 97395), (215, 94677), (285, 71423), (453, 44935), (473, 43035), (627, 32465), (645, 31559), (755, 26961), (817, 24915), (1045, 19479), (1419, 14345), (1661, 12255), (2265, 8987), (2365, 8607), (2451, 8305), (2869, 7095), (3135, 6493), (4085, 4983)]