19853121

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{691}}^1$

素因数の和:912

約数の個数: 16

約数和(自身を含む): 27115328

約数和(自身を除く): 7262207

約数列:

[1, 3, 61, 157, 183, 471, 691, 2073, 9577, 28731, 42151, 108487, 126453, 325461, 6617707, 19853121]

約数ペア:

[(1, 19853121), (3, 6617707), (61, 325461), (157, 126453), (183, 108487), (471, 42151), (691, 28731), (2073, 9577)]