21228935

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 32711616

約数和(自身を除く): 11482681

約数列:

[1, 5, 7, 13, 35, 37, 65, 91, 97, 169, 185, 259, 455, 481, 485, 679, 845, 1183, 1261, 1295, 2405, 3367, 3395, 3589, 5915, 6253, 6305, 8827, 16393, 16835, 17945, 25123, 31265, 43771, 44135, 46657, 81965, 114751, 125615, 218855, 233285, 326599, 573755, 606541, 1632995, 3032705, 4245787, 21228935]

約数ペア:

[(1, 21228935), (5, 4245787), (7, 3032705), (13, 1632995), (35, 606541), (37, 573755), (65, 326599), (91, 233285), (97, 218855), (169, 125615), (185, 114751), (259, 81965), (455, 46657), (481, 44135), (485, 43771), (679, 31265), (845, 25123), (1183, 17945), (1261, 16835), (1295, 16393), (2405, 8827), (3367, 6305), (3395, 6253), (3589, 5915)]