21721755

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2801}}^1$

素因数の和:2867

約数の個数: 32

約数和(自身を含む): 38734848

約数和(自身を除く): 17013093

約数列:

[1, 3, 5, 11, 15, 33, 47, 55, 141, 165, 235, 517, 705, 1551, 2585, 2801, 7755, 8403, 14005, 30811, 42015, 92433, 131647, 154055, 394941, 462165, 658235, 1448117, 1974705, 4344351, 7240585, 21721755]

約数ペア:

[(1, 21721755), (3, 7240585), (5, 4344351), (11, 1974705), (15, 1448117), (33, 658235), (47, 462165), (55, 394941), (141, 154055), (165, 131647), (235, 92433), (517, 42015), (705, 30811), (1551, 14005), (2585, 8403), (2801, 7755)]