21245315

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{881}}^1$

素因数の和:959

約数の個数: 32

約数和(自身を含む): 32006016

約数和(自身を除く): 10760701

約数列:

[1, 5, 7, 13, 35, 53, 65, 91, 265, 371, 455, 689, 881, 1855, 3445, 4405, 4823, 6167, 11453, 24115, 30835, 46693, 57265, 80171, 233465, 326851, 400855, 607009, 1634255, 3035045, 4249063, 21245315]

約数ペア:

[(1, 21245315), (5, 4249063), (7, 3035045), (13, 1634255), (35, 607009), (53, 400855), (65, 326851), (91, 233465), (265, 80171), (371, 57265), (455, 46693), (689, 30835), (881, 24115), (1855, 11453), (3445, 6167), (4405, 4823)]