21282985

素因数分解:

$5^1\times {\mathrm{113}}^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 26046720

約数和(自身を除く): 4763735

約数列:

[1, 5, 113, 139, 271, 565, 695, 1355, 15707, 30623, 37669, 78535, 153115, 188345, 4256597, 21282985]

約数ペア:

[(1, 21282985), (5, 4256597), (113, 188345), (139, 153115), (271, 78535), (565, 37669), (695, 30623), (1355, 15707)]