21101505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{997}}^1$

素因数の和:1105

約数の個数: 32

約数和(自身を含む): 36215424

約数和(自身を除く): 15113919

約数列:

[1, 3, 5, 15, 17, 51, 83, 85, 249, 255, 415, 997, 1245, 1411, 2991, 4233, 4985, 7055, 14955, 16949, 21165, 50847, 82751, 84745, 248253, 254235, 413755, 1241265, 1406767, 4220301, 7033835, 21101505]

約数ペア:

[(1, 21101505), (3, 7033835), (5, 4220301), (15, 1406767), (17, 1241265), (51, 413755), (83, 254235), (85, 248253), (249, 84745), (255, 82751), (415, 50847), (997, 21165), (1245, 16949), (1411, 14955), (2991, 7055), (4233, 4985)]