21105045

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{839}}^1$

素因数の和:906

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 19255275

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 117, 129, 195, 215, 387, 559, 585, 645, 839, 1677, 1935, 2517, 2795, 4195, 5031, 7551, 8385, 10907, 12585, 25155, 32721, 36077, 37755, 54535, 98163, 108231, 163605, 180385, 324693, 469001, 490815, 541155, 1407003, 1623465, 2345005, 4221009, 7035015, 21105045]

約数ペア:

[(1, 21105045), (3, 7035015), (5, 4221009), (9, 2345005), (13, 1623465), (15, 1407003), (39, 541155), (43, 490815), (45, 469001), (65, 324693), (117, 180385), (129, 163605), (195, 108231), (215, 98163), (387, 54535), (559, 37755), (585, 36077), (645, 32721), (839, 25155), (1677, 12585), (1935, 10907), (2517, 8385), (2795, 7551), (4195, 5031)]