21312993

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10620447

約数列:

[1, 3, 13, 39, 43, 71, 129, 179, 213, 537, 559, 923, 1677, 2327, 2769, 3053, 6981, 7697, 9159, 12709, 23091, 38127, 39689, 100061, 119067, 165217, 300183, 495651, 546487, 1639461, 7104331, 21312993]

約数ペア:

[(1, 21312993), (3, 7104331), (13, 1639461), (39, 546487), (43, 495651), (71, 300183), (129, 165217), (179, 119067), (213, 100061), (537, 39689), (559, 38127), (923, 23091), (1677, 12709), (2327, 9159), (2769, 7697), (3053, 6981)]