21398588

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{131}}^1\times {\mathrm{421}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 38212944

約数和(自身を除く): 16814356

約数列:

[1, 2, 4, 97, 131, 194, 262, 388, 421, 524, 842, 1684, 12707, 25414, 40837, 50828, 55151, 81674, 110302, 163348, 220604, 5349647, 10699294, 21398588]

約数ペア:

[(1, 21398588), (2, 10699294), (4, 5349647), (97, 220604), (131, 163348), (194, 110302), (262, 81674), (388, 55151), (421, 50828), (524, 40837), (842, 25414), (1684, 12707)]