21820265

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{229}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29808000

約数和(自身を除く): 7987735

約数列:

[1, 5, 17, 19, 59, 85, 95, 229, 295, 323, 1003, 1121, 1145, 1615, 3893, 4351, 5015, 5605, 13511, 19057, 19465, 21755, 67555, 73967, 95285, 229687, 256709, 369835, 1148435, 1283545, 4364053, 21820265]

約数ペア:

[(1, 21820265), (5, 4364053), (17, 1283545), (19, 1148435), (59, 369835), (85, 256709), (95, 229687), (229, 95285), (295, 73967), (323, 67555), (1003, 21755), (1121, 19465), (1145, 19057), (1615, 13511), (3893, 5605), (4351, 5015)]