21183440

素因数分解:

$2^4\times 5^1\times {\mathrm{264793}}^1$

素因数の和:264806

約数の個数: 20

約数和(自身を含む): 49251684

約数和(自身を除く): 28068244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264793, 529586, 1059172, 1323965, 2118344, 2647930, 4236688, 5295860, 10591720, 21183440]

約数ペア:

[(1, 21183440), (2, 10591720), (4, 5295860), (5, 4236688), (8, 2647930), (10, 2118344), (16, 1323965), (20, 1059172), (40, 529586), (80, 264793)]