21278608

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102301}}^1$

素因数の和:102322

約数の個数: 20

約数和(自身を含む): 44399068

約数和(自身を除く): 23120460

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102301, 204602, 409204, 818408, 1329913, 1636816, 2659826, 5319652, 10639304, 21278608]

約数ペア:

[(1, 21278608), (2, 10639304), (4, 5319652), (8, 2659826), (13, 1636816), (16, 1329913), (26, 818408), (52, 409204), (104, 204602), (208, 102301)]