21447881

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{4447}}^1$

素因数の和:4520

約数の個数: 16

約数和(自身を含む): 26901504

約数和(自身を除く): 5453623

約数列:

[1, 7, 13, 53, 91, 371, 689, 4447, 4823, 31129, 57811, 235691, 404677, 1649837, 3063983, 21447881]

約数ペア:

[(1, 21447881), (7, 3063983), (13, 1649837), (53, 404677), (91, 235691), (371, 57811), (689, 31129), (4447, 4823)]