21520904

素因数分解:

$2^3\times {\mathrm{83}}^1\times {\mathrm{32411}}^1$

素因数の和:32500

約数の個数: 16

約数和(自身を含む): 40839120

約数和(自身を除く): 19318216

約数列:

[1, 2, 4, 8, 83, 166, 332, 664, 32411, 64822, 129644, 259288, 2690113, 5380226, 10760452, 21520904]

約数ペア:

[(1, 21520904), (2, 10760452), (4, 5380226), (8, 2690113), (83, 259288), (166, 129644), (332, 64822), (664, 32411)]