201912921

素因数分解:

$3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{17707}}^1$

素因数の和:17901

約数の個数: 24

約数和(自身を含む): 335177024

約数和(自身を除く): 133264103

約数列:

[1, 3, 7, 9, 21, 63, 181, 543, 1267, 1629, 3801, 11403, 17707, 53121, 123949, 159363, 371847, 1115541, 3204967, 9614901, 22434769, 28844703, 67304307, 201912921]

約数ペア:

[(1, 201912921), (3, 67304307), (7, 28844703), (9, 22434769), (21, 9614901), (63, 3204967), (181, 1115541), (543, 371847), (1267, 159363), (1629, 123949), (3801, 53121), (11403, 17707)]