20591109

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 37999104

約数和(自身を除く): 17407995

約数列:

[1, 3, 7, 9, 11, 21, 33, 43, 63, 77, 99, 129, 231, 301, 387, 473, 691, 693, 903, 1419, 2073, 2709, 3311, 4257, 4837, 6219, 7601, 9933, 14511, 22803, 29713, 29799, 43533, 53207, 68409, 89139, 159621, 207991, 267417, 326843, 478863, 623973, 980529, 1871919, 2287901, 2941587, 6863703, 20591109]

約数ペア:

[(1, 20591109), (3, 6863703), (7, 2941587), (9, 2287901), (11, 1871919), (21, 980529), (33, 623973), (43, 478863), (63, 326843), (77, 267417), (99, 207991), (129, 159621), (231, 89139), (301, 68409), (387, 53207), (473, 43533), (691, 29799), (693, 29713), (903, 22803), (1419, 14511), (2073, 9933), (2709, 7601), (3311, 6219), (4257, 4837)]