21057855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15427}}^1$

素因数の和:15455

約数の個数: 32

約数和(自身を含む): 41470464

約数和(自身を除く): 20412609

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15427, 46281, 77135, 107989, 200551, 231405, 323967, 539945, 601653, 1002755, 1403857, 1619835, 3008265, 4211571, 7019285, 21057855]

約数ペア:

[(1, 21057855), (3, 7019285), (5, 4211571), (7, 3008265), (13, 1619835), (15, 1403857), (21, 1002755), (35, 601653), (39, 539945), (65, 323967), (91, 231405), (105, 200551), (195, 107989), (273, 77135), (455, 46281), (1365, 15427)]