21156656

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32251}}^1$

素因数の和:32300

約数の個数: 20

約数和(自身を含む): 41992104

約数和(自身を除く): 20835448

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32251, 64502, 129004, 258008, 516016, 1322291, 2644582, 5289164, 10578328, 21156656]

約数ペア:

[(1, 21156656), (2, 10578328), (4, 5289164), (8, 2644582), (16, 1322291), (41, 516016), (82, 258008), (164, 129004), (328, 64502), (656, 32251)]