21509912

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{65579}}^1$

素因数の和:65626

約数の個数: 16

約数和(自身を含む): 41315400

約数和(自身を除く): 19805488

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 65579, 131158, 262316, 524632, 2688739, 5377478, 10754956, 21509912]

約数ペア:

[(1, 21509912), (2, 10754956), (4, 5377478), (8, 2688739), (41, 524632), (82, 262316), (164, 131158), (328, 65579)]