21751760

素因数分解:

$2^4\times 5^1\times {\mathrm{271897}}^1$

素因数の和:271910

約数の個数: 20

約数和(自身を含む): 50573028

約数和(自身を除く): 28821268

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271897, 543794, 1087588, 1359485, 2175176, 2718970, 4350352, 5437940, 10875880, 21751760]

約数ペア:

[(1, 21751760), (2, 10875880), (4, 5437940), (5, 4350352), (8, 2718970), (10, 2175176), (16, 1359485), (20, 1087588), (40, 543794), (80, 271897)]