21278628

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4967}}^1$

素因数の和:5001

約数の個数: 72

約数和(自身を含む): 65100672

約数和(自身を除く): 43822044

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 21, 28, 34, 36, 42, 51, 63, 68, 84, 102, 119, 126, 153, 204, 238, 252, 306, 357, 476, 612, 714, 1071, 1428, 2142, 4284, 4967, 9934, 14901, 19868, 29802, 34769, 44703, 59604, 69538, 84439, 89406, 104307, 139076, 168878, 178812, 208614, 253317, 312921, 337756, 417228, 506634, 591073, 625842, 759951, 1013268, 1182146, 1251684, 1519902, 1773219, 2364292, 3039804, 3546438, 5319657, 7092876, 10639314, 21278628]

約数ペア:

[(1, 21278628), (2, 10639314), (3, 7092876), (4, 5319657), (6, 3546438), (7, 3039804), (9, 2364292), (12, 1773219), (14, 1519902), (17, 1251684), (18, 1182146), (21, 1013268), (28, 759951), (34, 625842), (36, 591073), (42, 506634), (51, 417228), (63, 337756), (68, 312921), (84, 253317), (102, 208614), (119, 178812), (126, 168878), (153, 139076), (204, 104307), (238, 89406), (252, 84439), (306, 69538), (357, 59604), (476, 44703), (612, 34769), (714, 29802), (1071, 19868), (1428, 14901), (2142, 9934), (4284, 4967)]