21148390

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20939}}^1$

素因数の和:21047

約数の個数: 16

約数和(自身を含む): 38445840

約数和(自身を除く): 17297450

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 20939, 41878, 104695, 209390, 2114839, 4229678, 10574195, 21148390]

約数ペア:

[(1, 21148390), (2, 10574195), (5, 4229678), (10, 2114839), (101, 209390), (202, 104695), (505, 41878), (1010, 20939)]