221354913

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1\times {\mathrm{613}}^1$

素因数の和:873

約数の個数: 32

約数和(自身を含む): 326785536

約数和(自身を除く): 105430623

約数列:

[1, 3, 13, 39, 47, 141, 197, 591, 611, 613, 1833, 1839, 2561, 7683, 7969, 9259, 23907, 27777, 28811, 86433, 120367, 120761, 361101, 362283, 374543, 1123629, 1569893, 4709679, 5675767, 17027301, 73784971, 221354913]

約数ペア:

[(1, 221354913), (3, 73784971), (13, 17027301), (39, 5675767), (47, 4709679), (141, 1569893), (197, 1123629), (591, 374543), (611, 362283), (613, 361101), (1833, 120761), (1839, 120367), (2561, 86433), (7683, 28811), (7969, 27777), (9259, 23907)]