21690416

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{491}}^1$

素因数の和:761

約数の個数: 40

約数和(自身を含む): 46122048

約数和(自身を除く): 24431632

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 251, 491, 502, 982, 1004, 1964, 2008, 2761, 3928, 4016, 5401, 5522, 7856, 10802, 11044, 21604, 22088, 43208, 44176, 86416, 123241, 246482, 492964, 985928, 1355651, 1971856, 2711302, 5422604, 10845208, 21690416]

約数ペア:

[(1, 21690416), (2, 10845208), (4, 5422604), (8, 2711302), (11, 1971856), (16, 1355651), (22, 985928), (44, 492964), (88, 246482), (176, 123241), (251, 86416), (491, 44176), (502, 43208), (982, 22088), (1004, 21604), (1964, 11044), (2008, 10802), (2761, 7856), (3928, 5522), (4016, 5401)]