20707815

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{643}}^1$

素因数の和:783

約数の個数: 32

約数和(自身を含む): 35239680

約数和(自身を除く): 14531865

約数列:

[1, 3, 5, 15, 19, 57, 95, 113, 285, 339, 565, 643, 1695, 1929, 2147, 3215, 6441, 9645, 10735, 12217, 32205, 36651, 61085, 72659, 183255, 217977, 363295, 1089885, 1380521, 4141563, 6902605, 20707815]

約数ペア:

[(1, 20707815), (3, 6902605), (5, 4141563), (15, 1380521), (19, 1089885), (57, 363295), (95, 217977), (113, 183255), (285, 72659), (339, 61085), (565, 36651), (643, 32205), (1695, 12217), (1929, 10735), (2147, 9645), (3215, 6441)]