19744777720

素因数分解:

$2^3\times 5^1\times {\mathrm{2081}}^1\times {\mathrm{237203}}^1$

素因数の和:239295

約数の個数: 32

約数和(自身を含む): 44447285520

約数和(自身を除く): 24702507800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2081, 4162, 8324, 10405, 16648, 20810, 41620, 83240, 237203, 474406, 948812, 1186015, 1897624, 2372030, 4744060, 9488120, 493619443, 987238886, 1974477772, 2468097215, 3948955544, 4936194430, 9872388860, 19744777720]

約数ペア:

[(1, 19744777720), (2, 9872388860), (4, 4936194430), (5, 3948955544), (8, 2468097215), (10, 1974477772), (20, 987238886), (40, 493619443), (2081, 9488120), (4162, 4744060), (8324, 2372030), (10405, 1897624), (16648, 1186015), (20810, 948812), (41620, 474406), (83240, 237203)]