21084760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{307}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 50893920

約数和(自身を除く): 29809160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 101, 136, 170, 202, 307, 340, 404, 505, 614, 680, 808, 1010, 1228, 1535, 1717, 2020, 2456, 3070, 3434, 4040, 5219, 6140, 6868, 8585, 10438, 12280, 13736, 17170, 20876, 26095, 31007, 34340, 41752, 52190, 62014, 68680, 104380, 124028, 155035, 208760, 248056, 310070, 527119, 620140, 1054238, 1240280, 2108476, 2635595, 4216952, 5271190, 10542380, 21084760]

約数ペア:

[(1, 21084760), (2, 10542380), (4, 5271190), (5, 4216952), (8, 2635595), (10, 2108476), (17, 1240280), (20, 1054238), (34, 620140), (40, 527119), (68, 310070), (85, 248056), (101, 208760), (136, 155035), (170, 124028), (202, 104380), (307, 68680), (340, 62014), (404, 52190), (505, 41752), (614, 34340), (680, 31007), (808, 26095), (1010, 20876), (1228, 17170), (1535, 13736), (1717, 12280), (2020, 10438), (2456, 8585), (3070, 6868), (3434, 6140), (4040, 5219)]