21000775

素因数分解:

$5^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{293}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 27123264

約数和(自身を除く): 6122489

約数列:

[1, 5, 25, 47, 61, 235, 293, 305, 1175, 1465, 1525, 2867, 7325, 13771, 14335, 17873, 68855, 71675, 89365, 344275, 446825, 840031, 4200155, 21000775]

約数ペア:

[(1, 21000775), (5, 4200155), (25, 840031), (47, 446825), (61, 344275), (235, 89365), (293, 71675), (305, 68855), (1175, 17873), (1465, 14335), (1525, 13771), (2867, 7325)]