21004005

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127297}}^1$

素因数の和:127316

約数の個数: 16

約数和(自身を含む): 36661824

約数和(自身を除く): 15657819

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 127297, 381891, 636485, 1400267, 1909455, 4200801, 7001335, 21004005]

約数ペア:

[(1, 21004005), (3, 7001335), (5, 4200801), (11, 1909455), (15, 1400267), (33, 636485), (55, 381891), (165, 127297)]