20371491

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{827}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 37200384

約数和(自身を除く): 16828893

約数列:

[1, 3, 7, 9, 17, 21, 23, 51, 63, 69, 119, 153, 161, 207, 357, 391, 483, 827, 1071, 1173, 1449, 2481, 2737, 3519, 5789, 7443, 8211, 14059, 17367, 19021, 24633, 42177, 52101, 57063, 98413, 126531, 133147, 171189, 295239, 323357, 399441, 885717, 970071, 1198323, 2263499, 2910213, 6790497, 20371491]

約数ペア:

[(1, 20371491), (3, 6790497), (7, 2910213), (9, 2263499), (17, 1198323), (21, 970071), (23, 885717), (51, 399441), (63, 323357), (69, 295239), (119, 171189), (153, 133147), (161, 126531), (207, 98413), (357, 57063), (391, 52101), (483, 42177), (827, 24633), (1071, 19021), (1173, 17367), (1449, 14059), (2481, 8211), (2737, 7443), (3519, 5789)]