20396187

素因数分解:

$3^2\times 7^1\times {\mathrm{421}}^1\times {\mathrm{769}}^1$

素因数の和:1203

約数の個数: 24

約数和(自身を含む): 33793760

約数和(自身を除く): 13397573

約数列:

[1, 3, 7, 9, 21, 63, 421, 769, 1263, 2307, 2947, 3789, 5383, 6921, 8841, 16149, 26523, 48447, 323749, 971247, 2266243, 2913741, 6798729, 20396187]

約数ペア:

[(1, 20396187), (3, 6798729), (7, 2913741), (9, 2266243), (21, 971247), (63, 323749), (421, 48447), (769, 26523), (1263, 16149), (2307, 8841), (2947, 6921), (3789, 5383)]