21534865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{2593}}^1$

素因数の和:2760

約数の個数: 16

約数和(自身を含む): 28388736

約数和(自身を除く): 6853871

約数列:

[1, 5, 11, 55, 151, 755, 1661, 2593, 8305, 12965, 28523, 142615, 391543, 1957715, 4306973, 21534865]

約数ペア:

[(1, 21534865), (5, 4306973), (11, 1957715), (55, 391543), (151, 142615), (755, 28523), (1661, 12965), (2593, 8305)]