21985857

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:734

約数の個数: 32

約数和(自身を含む): 34531200

約数和(自身を除く): 12545343

約数列:

[1, 3, 9, 27, 29, 43, 87, 129, 261, 387, 653, 783, 1161, 1247, 1959, 3741, 5877, 11223, 17631, 18937, 28079, 33669, 56811, 84237, 170433, 252711, 511299, 758133, 814291, 2442873, 7328619, 21985857]

約数ペア:

[(1, 21985857), (3, 7328619), (9, 2442873), (27, 814291), (29, 758133), (43, 511299), (87, 252711), (129, 170433), (261, 84237), (387, 56811), (653, 33669), (783, 28079), (1161, 18937), (1247, 17631), (1959, 11223), (3741, 5877)]