20590765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7350995

約数列:

[1, 5, 13, 43, 53, 65, 139, 215, 265, 559, 689, 695, 1807, 2279, 2795, 3445, 5977, 7367, 9035, 11395, 29627, 29885, 36835, 77701, 95771, 148135, 316781, 388505, 478855, 1583905, 4118153, 20590765]

約数ペア:

[(1, 20590765), (5, 4118153), (13, 1583905), (43, 478855), (53, 388505), (65, 316781), (139, 148135), (215, 95771), (265, 77701), (559, 36835), (689, 29885), (695, 29627), (1807, 11395), (2279, 9035), (2795, 7367), (3445, 5977)]