21249921

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1373}}^1$

素因数の和:1461

約数の個数: 32

約数和(自身を含む): 35877888

約数和(自身を除く): 14627967

約数列:

[1, 3, 7, 11, 21, 33, 67, 77, 201, 231, 469, 737, 1373, 1407, 2211, 4119, 5159, 9611, 15103, 15477, 28833, 45309, 91991, 105721, 275973, 317163, 643937, 1011901, 1931811, 3035703, 7083307, 21249921]

約数ペア:

[(1, 21249921), (3, 7083307), (7, 3035703), (11, 1931811), (21, 1011901), (33, 643937), (67, 317163), (77, 275973), (201, 105721), (231, 91991), (469, 45309), (737, 28833), (1373, 15477), (1407, 15103), (2211, 9611), (4119, 5159)]