20885907

素因数分解:

$3^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{3023}}^1$

素因数の和:3087

約数の個数: 24

約数和(自身を含む): 33094656

約数和(自身を除く): 12208749

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 987, 2303, 3023, 6909, 9069, 21161, 63483, 142081, 148127, 426243, 444381, 994567, 2983701, 6961969, 20885907]

約数ペア:

[(1, 20885907), (3, 6961969), (7, 2983701), (21, 994567), (47, 444381), (49, 426243), (141, 148127), (147, 142081), (329, 63483), (987, 21161), (2303, 9069), (3023, 6909)]