20280700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 48746880

約数和(自身を除く): 28466180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 103, 110, 179, 206, 220, 275, 358, 412, 515, 550, 716, 895, 1030, 1100, 1133, 1790, 1969, 2060, 2266, 2575, 3580, 3938, 4475, 4532, 5150, 5665, 7876, 8950, 9845, 10300, 11330, 17900, 18437, 19690, 22660, 28325, 36874, 39380, 49225, 56650, 73748, 92185, 98450, 113300, 184370, 196900, 202807, 368740, 405614, 460925, 811228, 921850, 1014035, 1843700, 2028070, 4056140, 5070175, 10140350, 20280700]

約数ペア:

[(1, 20280700), (2, 10140350), (4, 5070175), (5, 4056140), (10, 2028070), (11, 1843700), (20, 1014035), (22, 921850), (25, 811228), (44, 460925), (50, 405614), (55, 368740), (100, 202807), (103, 196900), (110, 184370), (179, 113300), (206, 98450), (220, 92185), (275, 73748), (358, 56650), (412, 49225), (515, 39380), (550, 36874), (716, 28325), (895, 22660), (1030, 19690), (1100, 18437), (1133, 17900), (1790, 11330), (1969, 10300), (2060, 9845), (2266, 8950), (2575, 7876), (3580, 5665), (3938, 5150), (4475, 4532)]