21715778

素因数分解:

$2^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{15991}}^1$

素因数の和:16097

約数の個数: 16

約数和(自身を含む): 37613184

約数和(自身を除く): 15897406

約数列:

[1, 2, 7, 14, 97, 194, 679, 1358, 15991, 31982, 111937, 223874, 1551127, 3102254, 10857889, 21715778]

約数ペア:

[(1, 21715778), (2, 10857889), (7, 3102254), (14, 1551127), (97, 223874), (194, 111937), (679, 31982), (1358, 15991)]