21979755

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7753}}^1$

素因数の和:7777

約数の個数: 40

約数和(自身を含む): 45035232

約数和(自身を除く): 23055477

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7753, 23259, 38765, 54271, 69777, 116295, 162813, 209331, 271355, 348885, 488439, 627993, 814065, 1046655, 1465317, 2442195, 3139965, 4395951, 7326585, 21979755]

約数ペア:

[(1, 21979755), (3, 7326585), (5, 4395951), (7, 3139965), (9, 2442195), (15, 1465317), (21, 1046655), (27, 814065), (35, 627993), (45, 488439), (63, 348885), (81, 271355), (105, 209331), (135, 162813), (189, 116295), (315, 69777), (405, 54271), (567, 38765), (945, 23259), (2835, 7753)]