21103173

素因数分解:

$3^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:448

約数の個数: 60

約数和(自身を含む): 39588780

約数和(自身を除く): 18485607

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 81, 91, 117, 147, 189, 273, 351, 409, 441, 567, 637, 819, 1053, 1227, 1323, 1911, 2457, 2863, 3681, 3969, 5317, 5733, 7371, 8589, 11043, 15951, 17199, 20041, 25767, 33129, 37219, 47853, 51597, 60123, 77301, 111657, 143559, 180369, 231903, 260533, 334971, 430677, 541107, 781599, 1004913, 1623321, 2344797, 3014739, 7034391, 21103173]

約数ペア:

[(1, 21103173), (3, 7034391), (7, 3014739), (9, 2344797), (13, 1623321), (21, 1004913), (27, 781599), (39, 541107), (49, 430677), (63, 334971), (81, 260533), (91, 231903), (117, 180369), (147, 143559), (189, 111657), (273, 77301), (351, 60123), (409, 51597), (441, 47853), (567, 37219), (637, 33129), (819, 25767), (1053, 20041), (1227, 17199), (1323, 15951), (1911, 11043), (2457, 8589), (2863, 7371), (3681, 5733), (3969, 5317)]