28017171

素因数分解:

$3^5\times 7^2\times {\mathrm{13}}^1\times {\mathrm{181}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 52865904

約数和(自身を除く): 24848733

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 81, 91, 117, 147, 181, 189, 243, 273, 351, 441, 543, 567, 637, 819, 1053, 1267, 1323, 1629, 1701, 1911, 2353, 2457, 3159, 3801, 3969, 4887, 5733, 7059, 7371, 8869, 11403, 11907, 14661, 16471, 17199, 21177, 22113, 26607, 34209, 43983, 49413, 51597, 63531, 79821, 102627, 115297, 148239, 154791, 190593, 239463, 307881, 345891, 444717, 571779, 718389, 1037673, 1334151, 2155167, 3113019, 4002453, 9339057, 28017171]

約数ペア:

[(1, 28017171), (3, 9339057), (7, 4002453), (9, 3113019), (13, 2155167), (21, 1334151), (27, 1037673), (39, 718389), (49, 571779), (63, 444717), (81, 345891), (91, 307881), (117, 239463), (147, 190593), (181, 154791), (189, 148239), (243, 115297), (273, 102627), (351, 79821), (441, 63531), (543, 51597), (567, 49413), (637, 43983), (819, 34209), (1053, 26607), (1267, 22113), (1323, 21177), (1629, 17199), (1701, 16471), (1911, 14661), (2353, 11907), (2457, 11403), (3159, 8869), (3801, 7371), (3969, 7059), (4887, 5733)]