21987728

素因数分解:

$2^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4177}}^1$

素因数の和:4239

約数の個数: 40

約数和(自身を含む): 49734912

約数和(自身を除く): 27747184

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 47, 56, 94, 112, 188, 329, 376, 658, 752, 1316, 2632, 4177, 5264, 8354, 16708, 29239, 33416, 58478, 66832, 116956, 196319, 233912, 392638, 467824, 785276, 1374233, 1570552, 2748466, 3141104, 5496932, 10993864, 21987728]

約数ペア:

[(1, 21987728), (2, 10993864), (4, 5496932), (7, 3141104), (8, 2748466), (14, 1570552), (16, 1374233), (28, 785276), (47, 467824), (56, 392638), (94, 233912), (112, 196319), (188, 116956), (329, 66832), (376, 58478), (658, 33416), (752, 29239), (1316, 16708), (2632, 8354), (4177, 5264)]