20289040

素因数分解:

$2^4\times 5^1\times {\mathrm{253613}}^1$

素因数の和:253626

約数の個数: 20

約数和(自身を含む): 47172204

約数和(自身を除く): 26883164

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253613, 507226, 1014452, 1268065, 2028904, 2536130, 4057808, 5072260, 10144520, 20289040]

約数ペア:

[(1, 20289040), (2, 10144520), (4, 5072260), (5, 4057808), (8, 2536130), (10, 2028904), (16, 1268065), (20, 1014452), (40, 507226), (80, 253613)]