20795720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{313}}^1$

素因数の和:486

約数の個数: 64

約数和(自身を含む): 51546240

約数和(自身を除く): 30750520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 151, 220, 302, 313, 440, 604, 626, 755, 1208, 1252, 1510, 1565, 1661, 2504, 3020, 3130, 3322, 3443, 6040, 6260, 6644, 6886, 8305, 12520, 13288, 13772, 16610, 17215, 27544, 33220, 34430, 47263, 66440, 68860, 94526, 137720, 189052, 236315, 378104, 472630, 519893, 945260, 1039786, 1890520, 2079572, 2599465, 4159144, 5198930, 10397860, 20795720]

約数ペア:

[(1, 20795720), (2, 10397860), (4, 5198930), (5, 4159144), (8, 2599465), (10, 2079572), (11, 1890520), (20, 1039786), (22, 945260), (40, 519893), (44, 472630), (55, 378104), (88, 236315), (110, 189052), (151, 137720), (220, 94526), (302, 68860), (313, 66440), (440, 47263), (604, 34430), (626, 33220), (755, 27544), (1208, 17215), (1252, 16610), (1510, 13772), (1565, 13288), (1661, 12520), (2504, 8305), (3020, 6886), (3130, 6644), (3322, 6260), (3443, 6040)]