21390995

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{2689}}^1$

素因数の和:2774

約数の個数: 16

約数和(自身を含む): 26986080

約数和(自身を除く): 5595085

約数列:

[1, 5, 37, 43, 185, 215, 1591, 2689, 7955, 13445, 99493, 115627, 497465, 578135, 4278199, 21390995]

約数ペア:

[(1, 21390995), (5, 4278199), (37, 578135), (43, 497465), (185, 115627), (215, 99493), (1591, 13445), (2689, 7955)]