21740455

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 8451161

約数列:

[1, 5, 11, 31, 41, 55, 155, 205, 311, 341, 451, 1271, 1555, 1705, 2255, 3421, 6355, 9641, 12751, 13981, 17105, 48205, 63755, 69905, 106051, 140261, 395281, 530255, 701305, 1976405, 4348091, 21740455]

約数ペア:

[(1, 21740455), (5, 4348091), (11, 1976405), (31, 701305), (41, 530255), (55, 395281), (155, 140261), (205, 106051), (311, 69905), (341, 63755), (451, 48205), (1271, 17105), (1555, 13981), (1705, 12751), (2255, 9641), (3421, 6355)]