21656915

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26903}}^1$

素因数の和:26938

約数の個数: 16

約数和(自身を含む): 30993408

約数和(自身を除く): 9336493

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26903, 134515, 188321, 618769, 941605, 3093845, 4331383, 21656915]

約数ペア:

[(1, 21656915), (5, 4331383), (7, 3093845), (23, 941605), (35, 618769), (115, 188321), (161, 134515), (805, 26903)]