20979595

素因数分解:

$5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{941}}^1$

素因数の和:980

約数の個数: 32

約数和(自身を含む): 31651200

約数和(自身を除く): 10671605

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 343, 455, 637, 941, 1715, 3185, 4459, 4705, 6587, 12233, 22295, 32935, 46109, 61165, 85631, 230545, 322763, 428155, 599417, 1613815, 2997085, 4195919, 20979595]

約数ペア:

[(1, 20979595), (5, 4195919), (7, 2997085), (13, 1613815), (35, 599417), (49, 428155), (65, 322763), (91, 230545), (245, 85631), (343, 61165), (455, 46109), (637, 32935), (941, 22295), (1715, 12233), (3185, 6587), (4459, 4705)]