19802720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17681}}^1$

素因数の和:17703

約数の個数: 48

約数和(自身を含む): 53470368

約数和(自身を除く): 33667648

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17681, 35362, 70724, 88405, 123767, 141448, 176810, 247534, 282896, 353620, 495068, 565792, 618835, 707240, 990136, 1237670, 1414480, 1980272, 2475340, 2828960, 3960544, 4950680, 9901360, 19802720]

約数ペア:

[(1, 19802720), (2, 9901360), (4, 4950680), (5, 3960544), (7, 2828960), (8, 2475340), (10, 1980272), (14, 1414480), (16, 1237670), (20, 990136), (28, 707240), (32, 618835), (35, 565792), (40, 495068), (56, 353620), (70, 282896), (80, 247534), (112, 176810), (140, 141448), (160, 123767), (224, 88405), (280, 70724), (560, 35362), (1120, 17681)]