21151611

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{379}}^1$

素因数の和:457

約数の個数: 40

約数和(自身を含む): 34760880

約数和(自身を除く): 13609269

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 117, 159, 351, 379, 477, 689, 1053, 1137, 1431, 2067, 3411, 4293, 4927, 6201, 10233, 14781, 18603, 20087, 30699, 44343, 55809, 60261, 133029, 180783, 261131, 399087, 542349, 783393, 1627047, 2350179, 7050537, 21151611]

約数ペア:

[(1, 21151611), (3, 7050537), (9, 2350179), (13, 1627047), (27, 783393), (39, 542349), (53, 399087), (81, 261131), (117, 180783), (159, 133029), (351, 60261), (379, 55809), (477, 44343), (689, 30699), (1053, 20087), (1137, 18603), (1431, 14781), (2067, 10233), (3411, 6201), (4293, 4927)]