21666771

素因数分解:

$3^4\times 7^2\times {\mathrm{53}}^1\times {\mathrm{103}}^1$

素因数の和:182

約数の個数: 60

約数和(自身を含む): 38733552

約数和(自身を除く): 17066781

約数列:

[1, 3, 7, 9, 21, 27, 49, 53, 63, 81, 103, 147, 159, 189, 309, 371, 441, 477, 567, 721, 927, 1113, 1323, 1431, 2163, 2597, 2781, 3339, 3969, 4293, 5047, 5459, 6489, 7791, 8343, 10017, 15141, 16377, 19467, 23373, 30051, 38213, 45423, 49131, 58401, 70119, 114639, 136269, 147393, 210357, 267491, 343917, 408807, 442179, 802473, 1031751, 2407419, 3095253, 7222257, 21666771]

約数ペア:

[(1, 21666771), (3, 7222257), (7, 3095253), (9, 2407419), (21, 1031751), (27, 802473), (49, 442179), (53, 408807), (63, 343917), (81, 267491), (103, 210357), (147, 147393), (159, 136269), (189, 114639), (309, 70119), (371, 58401), (441, 49131), (477, 45423), (567, 38213), (721, 30051), (927, 23373), (1113, 19467), (1323, 16377), (1431, 15141), (2163, 10017), (2597, 8343), (2781, 7791), (3339, 6489), (3969, 5459), (4293, 5047)]