21256018

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:167

約数の個数: 64

約数和(自身を含む): 41361408

約数和(自身を除く): 20105390

約数列:

[1, 2, 7, 14, 17, 31, 34, 43, 62, 67, 86, 119, 134, 217, 238, 301, 434, 469, 527, 602, 731, 938, 1054, 1139, 1333, 1462, 2077, 2278, 2666, 2881, 3689, 4154, 5117, 5762, 7378, 7973, 9331, 10234, 14539, 15946, 18662, 20167, 22661, 29078, 35309, 40334, 45322, 48977, 70618, 89311, 97954, 158627, 178622, 247163, 317254, 342839, 494326, 625177, 685678, 1250354, 1518287, 3036574, 10628009, 21256018]

約数ペア:

[(1, 21256018), (2, 10628009), (7, 3036574), (14, 1518287), (17, 1250354), (31, 685678), (34, 625177), (43, 494326), (62, 342839), (67, 317254), (86, 247163), (119, 178622), (134, 158627), (217, 97954), (238, 89311), (301, 70618), (434, 48977), (469, 45322), (527, 40334), (602, 35309), (731, 29078), (938, 22661), (1054, 20167), (1139, 18662), (1333, 15946), (1462, 14539), (2077, 10234), (2278, 9331), (2666, 7973), (2881, 7378), (3689, 5762), (4154, 5117)]