21201808

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12157}}^1$

素因数の和:12274

約数の個数: 20

約数和(自身を含む): 41458780

約数和(自身を除く): 20256972

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12157, 24314, 48628, 97256, 194512, 1325113, 2650226, 5300452, 10600904, 21201808]

約数ペア:

[(1, 21201808), (2, 10600904), (4, 5300452), (8, 2650226), (16, 1325113), (109, 194512), (218, 97256), (436, 48628), (872, 24314), (1744, 12157)]