20805520

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1871}}^1$

素因数の和:2023

約数の個数: 40

約数和(自身を含む): 48746880

約数和(自身を除く): 27941360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1871, 2224, 2780, 3742, 5560, 7484, 9355, 11120, 14968, 18710, 29936, 37420, 74840, 149680, 260069, 520138, 1040276, 1300345, 2080552, 2600690, 4161104, 5201380, 10402760, 20805520]

約数ペア:

[(1, 20805520), (2, 10402760), (4, 5201380), (5, 4161104), (8, 2600690), (10, 2080552), (16, 1300345), (20, 1040276), (40, 520138), (80, 260069), (139, 149680), (278, 74840), (556, 37420), (695, 29936), (1112, 18710), (1390, 14968), (1871, 11120), (2224, 9355), (2780, 7484), (3742, 5560)]