20861648

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{337}}^1$

素因数の和:471

約数の個数: 40

約数和(自身を含む): 41870088

約数和(自身を除く): 21008440

約数列:

[1, 2, 4, 8, 16, 53, 73, 106, 146, 212, 292, 337, 424, 584, 674, 848, 1168, 1348, 2696, 3869, 5392, 7738, 15476, 17861, 24601, 30952, 35722, 49202, 61904, 71444, 98404, 142888, 196808, 285776, 393616, 1303853, 2607706, 5215412, 10430824, 20861648]

約数ペア:

[(1, 20861648), (2, 10430824), (4, 5215412), (8, 2607706), (16, 1303853), (53, 393616), (73, 285776), (106, 196808), (146, 142888), (212, 98404), (292, 71444), (337, 61904), (424, 49202), (584, 35722), (674, 30952), (848, 24601), (1168, 17861), (1348, 15476), (2696, 7738), (3869, 5392)]