21757390

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27541}}^1$

素因数の和:27627

約数の個数: 16

約数和(自身を含む): 39660480

約数和(自身を除く): 17903090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27541, 55082, 137705, 275410, 2175739, 4351478, 10878695, 21757390]

約数ペア:

[(1, 21757390), (2, 10878695), (5, 4351478), (10, 2175739), (79, 275410), (158, 137705), (395, 55082), (790, 27541)]