21251403

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:233

約数の個数: 40

約数和(自身を含む): 33541200

約数和(自身を除く): 12289797

約数列:

[1, 3, 9, 27, 29, 81, 83, 87, 109, 249, 261, 327, 747, 783, 981, 2241, 2349, 2407, 2943, 3161, 6723, 7221, 8829, 9047, 9483, 21663, 27141, 28449, 64989, 81423, 85347, 194967, 244269, 256041, 262363, 732807, 787089, 2361267, 7083801, 21251403]

約数ペア:

[(1, 21251403), (3, 7083801), (9, 2361267), (27, 787089), (29, 732807), (81, 262363), (83, 256041), (87, 244269), (109, 194967), (249, 85347), (261, 81423), (327, 64989), (747, 28449), (783, 27141), (981, 21663), (2241, 9483), (2349, 9047), (2407, 8829), (2943, 7221), (3161, 6723)]