20504781

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{991}}^1$

素因数の和:1038

約数の個数: 36

約数和(自身を含む): 34303360

約数和(自身を除く): 13798579

約数列:

[1, 3, 9, 11, 19, 33, 57, 99, 121, 171, 209, 363, 627, 991, 1089, 1881, 2299, 2973, 6897, 8919, 10901, 18829, 20691, 32703, 56487, 98109, 119911, 169461, 207119, 359733, 621357, 1079199, 1864071, 2278309, 6834927, 20504781]

約数ペア:

[(1, 20504781), (3, 6834927), (9, 2278309), (11, 1864071), (19, 1079199), (33, 621357), (57, 359733), (99, 207119), (121, 169461), (171, 119911), (209, 98109), (363, 56487), (627, 32703), (991, 20691), (1089, 18829), (1881, 10901), (2299, 8919), (2973, 6897)]