21173775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1301}}^1$

素因数の和:1352

約数の個数: 48

約数和(自身を含む): 41330688

約数和(自身を除く): 20156913

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 75, 93, 105, 155, 175, 217, 465, 525, 651, 775, 1085, 1301, 2325, 3255, 3903, 5425, 6505, 9107, 16275, 19515, 27321, 32525, 40331, 45535, 97575, 120993, 136605, 201655, 227675, 282317, 604965, 683025, 846951, 1008275, 1411585, 3024825, 4234755, 7057925, 21173775]

約数ペア:

[(1, 21173775), (3, 7057925), (5, 4234755), (7, 3024825), (15, 1411585), (21, 1008275), (25, 846951), (31, 683025), (35, 604965), (75, 282317), (93, 227675), (105, 201655), (155, 136605), (175, 120993), (217, 97575), (465, 45535), (525, 40331), (651, 32525), (775, 27321), (1085, 19515), (1301, 16275), (2325, 9107), (3255, 6505), (3903, 5425)]