19973457

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 34539648

約数和(自身を除く): 14566191

約数列:

[1, 3, 7, 9, 21, 43, 63, 73, 101, 129, 219, 301, 303, 387, 511, 657, 707, 903, 909, 1533, 2121, 2709, 3139, 4343, 4599, 6363, 7373, 9417, 13029, 21973, 22119, 28251, 30401, 39087, 51611, 65919, 66357, 91203, 154833, 197757, 273609, 317039, 464499, 951117, 2219273, 2853351, 6657819, 19973457]

約数ペア:

[(1, 19973457), (3, 6657819), (7, 2853351), (9, 2219273), (21, 951117), (43, 464499), (63, 317039), (73, 273609), (101, 197757), (129, 154833), (219, 91203), (301, 66357), (303, 65919), (387, 51611), (511, 39087), (657, 30401), (707, 28251), (903, 22119), (909, 21973), (1533, 13029), (2121, 9417), (2709, 7373), (3139, 6363), (4343, 4599)]