21074515

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:152

約数の個数: 64

約数和(自身を含む): 34467840

約数和(自身を除く): 13393325

約数列:

[1, 5, 7, 11, 19, 35, 43, 55, 67, 77, 95, 133, 209, 215, 301, 335, 385, 469, 473, 665, 737, 817, 1045, 1273, 1463, 1505, 2345, 2365, 2881, 3311, 3685, 4085, 5159, 5719, 6365, 7315, 8911, 8987, 14003, 14405, 16555, 20167, 25795, 28595, 31691, 44555, 44935, 54739, 62909, 70015, 98021, 100835, 158455, 221837, 273695, 314545, 383173, 490105, 602129, 1109185, 1915865, 3010645, 4214903, 21074515]

約数ペア:

[(1, 21074515), (5, 4214903), (7, 3010645), (11, 1915865), (19, 1109185), (35, 602129), (43, 490105), (55, 383173), (67, 314545), (77, 273695), (95, 221837), (133, 158455), (209, 100835), (215, 98021), (301, 70015), (335, 62909), (385, 54739), (469, 44935), (473, 44555), (665, 31691), (737, 28595), (817, 25795), (1045, 20167), (1273, 16555), (1463, 14405), (1505, 14003), (2345, 8987), (2365, 8911), (2881, 7315), (3311, 6365), (3685, 5719), (4085, 5159)]