21045904

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{607}}^1$

素因数の和:823

約数の個数: 40

約数和(自身を含む): 44782848

約数和(自身を除く): 23736944

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 197, 394, 607, 788, 1214, 1576, 2167, 2428, 3152, 4334, 4856, 6677, 8668, 9712, 13354, 17336, 26708, 34672, 53416, 106832, 119579, 239158, 478316, 956632, 1315369, 1913264, 2630738, 5261476, 10522952, 21045904]

約数ペア:

[(1, 21045904), (2, 10522952), (4, 5261476), (8, 2630738), (11, 1913264), (16, 1315369), (22, 956632), (44, 478316), (88, 239158), (176, 119579), (197, 106832), (394, 53416), (607, 34672), (788, 26708), (1214, 17336), (1576, 13354), (2167, 9712), (2428, 8668), (3152, 6677), (4334, 4856)]