21477855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 41361408

約数和(自身を除く): 19883553

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 67, 71, 105, 129, 201, 213, 215, 301, 335, 355, 469, 497, 645, 903, 1005, 1065, 1407, 1491, 1505, 2345, 2485, 2881, 3053, 4515, 4757, 7035, 7455, 8643, 9159, 14271, 14405, 15265, 20167, 21371, 23785, 33299, 43215, 45795, 60501, 64113, 71355, 99897, 100835, 106855, 166495, 204551, 302505, 320565, 499485, 613653, 1022755, 1431857, 3068265, 4295571, 7159285, 21477855]

約数ペア:

[(1, 21477855), (3, 7159285), (5, 4295571), (7, 3068265), (15, 1431857), (21, 1022755), (35, 613653), (43, 499485), (67, 320565), (71, 302505), (105, 204551), (129, 166495), (201, 106855), (213, 100835), (215, 99897), (301, 71355), (335, 64113), (355, 60501), (469, 45795), (497, 43215), (645, 33299), (903, 23785), (1005, 21371), (1065, 20167), (1407, 15265), (1491, 14405), (1505, 14271), (2345, 9159), (2485, 8643), (2881, 7455), (3053, 7035), (4515, 4757)]