21000921903

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{51683}}^1$

素因数の和:51876

約数の個数: 48

約数和(自身を含む): 34314868224

約数和(自身を除く): 13313946321

約数列:

[1, 3, 9, 13, 23, 39, 69, 117, 151, 207, 299, 453, 897, 1359, 1963, 2691, 3473, 5889, 10419, 17667, 31257, 45149, 51683, 135447, 155049, 406341, 465147, 671879, 1188709, 2015637, 3566127, 6046911, 7804133, 10698381, 15453217, 23412399, 46359651, 70237197, 101453729, 139078953, 179495059, 304361187, 538485177, 913083561, 1615455531, 2333435767, 7000307301, 21000921903]

約数ペア:

[(1, 21000921903), (3, 7000307301), (9, 2333435767), (13, 1615455531), (23, 913083561), (39, 538485177), (69, 304361187), (117, 179495059), (151, 139078953), (207, 101453729), (299, 70237197), (453, 46359651), (897, 23412399), (1359, 15453217), (1963, 10698381), (2691, 7804133), (3473, 6046911), (5889, 3566127), (10419, 2015637), (17667, 1188709), (31257, 671879), (45149, 465147), (51683, 406341), (135447, 155049)]