21051441

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{313}}^1$

素因数の和:422

約数の個数: 32

約数和(自身を含む): 32555520

約数和(自身を除く): 11504079

約数列:

[1, 3, 9, 27, 47, 53, 141, 159, 313, 423, 477, 939, 1269, 1431, 2491, 2817, 7473, 8451, 14711, 16589, 22419, 44133, 49767, 67257, 132399, 149301, 397197, 447903, 779683, 2339049, 7017147, 21051441]

約数ペア:

[(1, 21051441), (3, 7017147), (9, 2339049), (27, 779683), (47, 447903), (53, 397197), (141, 149301), (159, 132399), (313, 67257), (423, 49767), (477, 44133), (939, 22419), (1269, 16589), (1431, 14711), (2491, 8451), (2817, 7473)]