21219597

素因数分解:

$3^3\times 7^2\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 37519680

約数和(自身を除く): 16300083

約数列:

[1, 3, 7, 9, 21, 27, 43, 49, 63, 129, 147, 189, 301, 373, 387, 441, 903, 1119, 1161, 1323, 2107, 2611, 2709, 3357, 6321, 7833, 8127, 10071, 16039, 18277, 18963, 23499, 48117, 54831, 56889, 70497, 112273, 144351, 164493, 336819, 433053, 493479, 785911, 1010457, 2357733, 3031371, 7073199, 21219597]

約数ペア:

[(1, 21219597), (3, 7073199), (7, 3031371), (9, 2357733), (21, 1010457), (27, 785911), (43, 493479), (49, 433053), (63, 336819), (129, 164493), (147, 144351), (189, 112273), (301, 70497), (373, 56889), (387, 54831), (441, 48117), (903, 23499), (1119, 18963), (1161, 18277), (1323, 16039), (2107, 10071), (2611, 8127), (2709, 7833), (3357, 6321)]