21298088

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{541}}^1$

素因数の和:610

約数の個数: 64

約数和(自身を含む): 49430400

約数和(自身を除く): 28132312

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 37, 38, 56, 74, 76, 133, 148, 152, 259, 266, 296, 518, 532, 541, 703, 1036, 1064, 1082, 1406, 2072, 2164, 2812, 3787, 4328, 4921, 5624, 7574, 9842, 10279, 15148, 19684, 20017, 20558, 30296, 39368, 40034, 41116, 71953, 80068, 82232, 140119, 143906, 160136, 280238, 287812, 380323, 560476, 575624, 760646, 1120952, 1521292, 2662261, 3042584, 5324522, 10649044, 21298088]

約数ペア:

[(1, 21298088), (2, 10649044), (4, 5324522), (7, 3042584), (8, 2662261), (14, 1521292), (19, 1120952), (28, 760646), (37, 575624), (38, 560476), (56, 380323), (74, 287812), (76, 280238), (133, 160136), (148, 143906), (152, 140119), (259, 82232), (266, 80068), (296, 71953), (518, 41116), (532, 40034), (541, 39368), (703, 30296), (1036, 20558), (1064, 20017), (1082, 19684), (1406, 15148), (2072, 10279), (2164, 9842), (2812, 7574), (3787, 5624), (4328, 4921)]