21989415

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 43352064

約数和(自身を除く): 21362649

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 97, 105, 119, 127, 255, 291, 357, 381, 485, 595, 635, 679, 889, 1455, 1649, 1785, 1905, 2037, 2159, 2667, 3395, 4445, 4947, 6477, 8245, 10185, 10795, 11543, 12319, 13335, 15113, 24735, 32385, 34629, 36957, 45339, 57715, 61595, 75565, 86233, 173145, 184785, 209423, 226695, 258699, 431165, 628269, 1047115, 1293495, 1465961, 3141345, 4397883, 7329805, 21989415]

約数ペア:

[(1, 21989415), (3, 7329805), (5, 4397883), (7, 3141345), (15, 1465961), (17, 1293495), (21, 1047115), (35, 628269), (51, 431165), (85, 258699), (97, 226695), (105, 209423), (119, 184785), (127, 173145), (255, 86233), (291, 75565), (357, 61595), (381, 57715), (485, 45339), (595, 36957), (635, 34629), (679, 32385), (889, 24735), (1455, 15113), (1649, 13335), (1785, 12319), (1905, 11543), (2037, 10795), (2159, 10185), (2667, 8245), (3395, 6477), (4445, 4947)]