20998980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1051}}^1$

素因数の和:1106

約数の個数: 96

約数和(自身を含む): 67159680

約数和(自身を除く): 46160700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 37, 45, 54, 60, 74, 90, 108, 111, 135, 148, 180, 185, 222, 270, 333, 370, 444, 540, 555, 666, 740, 999, 1051, 1110, 1332, 1665, 1998, 2102, 2220, 3153, 3330, 3996, 4204, 4995, 5255, 6306, 6660, 9459, 9990, 10510, 12612, 15765, 18918, 19980, 21020, 28377, 31530, 37836, 38887, 47295, 56754, 63060, 77774, 94590, 113508, 116661, 141885, 155548, 189180, 194435, 233322, 283770, 349983, 388870, 466644, 567540, 583305, 699966, 777740, 1049949, 1166610, 1399932, 1749915, 2099898, 2333220, 3499830, 4199796, 5249745, 6999660, 10499490, 20998980]

約数ペア:

[(1, 20998980), (2, 10499490), (3, 6999660), (4, 5249745), (5, 4199796), (6, 3499830), (9, 2333220), (10, 2099898), (12, 1749915), (15, 1399932), (18, 1166610), (20, 1049949), (27, 777740), (30, 699966), (36, 583305), (37, 567540), (45, 466644), (54, 388870), (60, 349983), (74, 283770), (90, 233322), (108, 194435), (111, 189180), (135, 155548), (148, 141885), (180, 116661), (185, 113508), (222, 94590), (270, 77774), (333, 63060), (370, 56754), (444, 47295), (540, 38887), (555, 37836), (666, 31530), (740, 28377), (999, 21020), (1051, 19980), (1110, 18918), (1332, 15765), (1665, 12612), (1998, 10510), (2102, 9990), (2220, 9459), (3153, 6660), (3330, 6306), (3996, 5255), (4204, 4995)]