21405087

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{743}}^1$

素因数の和:860

約数の個数: 32

約数和(自身を含む): 34997760

約数和(自身を除く): 13592673

約数列:

[1, 3, 9, 11, 27, 33, 97, 99, 291, 297, 743, 873, 1067, 2229, 2619, 3201, 6687, 8173, 9603, 20061, 24519, 28809, 72071, 73557, 216213, 220671, 648639, 792781, 1945917, 2378343, 7135029, 21405087]

約数ペア:

[(1, 21405087), (3, 7135029), (9, 2378343), (11, 1945917), (27, 792781), (33, 648639), (97, 220671), (99, 216213), (291, 73557), (297, 72071), (743, 28809), (873, 24519), (1067, 20061), (2229, 9603), (2619, 8173), (3201, 6687)]