20605725

素因数分解:

$3^3\times 5^2\times 7^3\times {\mathrm{89}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 44640000

約数和(自身を除く): 24034275

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 49, 63, 75, 89, 105, 135, 147, 175, 189, 225, 245, 267, 315, 343, 441, 445, 525, 623, 675, 735, 801, 945, 1029, 1225, 1323, 1335, 1575, 1715, 1869, 2205, 2225, 2403, 3087, 3115, 3675, 4005, 4361, 4725, 5145, 5607, 6615, 6675, 8575, 9261, 9345, 11025, 12015, 13083, 15435, 15575, 16821, 20025, 21805, 25725, 28035, 30527, 33075, 39249, 46305, 46725, 60075, 65415, 77175, 84105, 91581, 109025, 117747, 140175, 152635, 196245, 231525, 274743, 327075, 420525, 457905, 588735, 763175, 824229, 981225, 1373715, 2289525, 2943675, 4121145, 6868575, 20605725]

約数ペア:

[(1, 20605725), (3, 6868575), (5, 4121145), (7, 2943675), (9, 2289525), (15, 1373715), (21, 981225), (25, 824229), (27, 763175), (35, 588735), (45, 457905), (49, 420525), (63, 327075), (75, 274743), (89, 231525), (105, 196245), (135, 152635), (147, 140175), (175, 117747), (189, 109025), (225, 91581), (245, 84105), (267, 77175), (315, 65415), (343, 60075), (441, 46725), (445, 46305), (525, 39249), (623, 33075), (675, 30527), (735, 28035), (801, 25725), (945, 21805), (1029, 20025), (1225, 16821), (1323, 15575), (1335, 15435), (1575, 13083), (1715, 12015), (1869, 11025), (2205, 9345), (2225, 9261), (2403, 8575), (3087, 6675), (3115, 6615), (3675, 5607), (4005, 5145), (4361, 4725)]