21187070

素因数分解:

$2^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{19801}}^1$

素因数の和:19915

約数の個数: 16

約数和(自身を含む): 38495088

約数和(自身を除く): 17308018

約数列:

[1, 2, 5, 10, 107, 214, 535, 1070, 19801, 39602, 99005, 198010, 2118707, 4237414, 10593535, 21187070]

約数ペア:

[(1, 21187070), (2, 10593535), (5, 4237414), (10, 2118707), (107, 198010), (214, 99005), (535, 39602), (1070, 19801)]