21000940478

素因数分解:

$2^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1091}}^1\times {\mathrm{1907}}^1$

素因数の和:3117

約数の個数: 48

約数和(自身を含む): 37053604224

約数和(自身を除く): 16052663746

約数列:

[1, 2, 7, 14, 49, 98, 103, 206, 721, 1091, 1442, 1907, 2182, 3814, 5047, 7637, 10094, 13349, 15274, 26698, 53459, 93443, 106918, 112373, 186886, 196421, 224746, 392842, 786611, 1374947, 1573222, 2080537, 2749894, 4161074, 5506277, 9624629, 11012554, 14563759, 19249258, 29127518, 101946313, 203892626, 214295311, 428590622, 1500067177, 3000134354, 10500470239, 21000940478]

約数ペア:

[(1, 21000940478), (2, 10500470239), (7, 3000134354), (14, 1500067177), (49, 428590622), (98, 214295311), (103, 203892626), (206, 101946313), (721, 29127518), (1091, 19249258), (1442, 14563759), (1907, 11012554), (2182, 9624629), (3814, 5506277), (5047, 4161074), (7637, 2749894), (10094, 2080537), (13349, 1573222), (15274, 1374947), (26698, 786611), (53459, 392842), (93443, 224746), (106918, 196421), (112373, 186886)]