20355237

素因数分解:

$3^2\times 7^2\times {\mathrm{101}}^1\times {\mathrm{457}}^1$

素因数の和:578

約数の個数: 36

約数和(自身を含む): 34616556

約数和(自身を除く): 14261319

約数列:

[1, 3, 7, 9, 21, 49, 63, 101, 147, 303, 441, 457, 707, 909, 1371, 2121, 3199, 4113, 4949, 6363, 9597, 14847, 22393, 28791, 44541, 46157, 67179, 138471, 201537, 323099, 415413, 969297, 2261693, 2907891, 6785079, 20355237]

約数ペア:

[(1, 20355237), (3, 6785079), (7, 2907891), (9, 2261693), (21, 969297), (49, 415413), (63, 323099), (101, 201537), (147, 138471), (303, 67179), (441, 46157), (457, 44541), (707, 28791), (909, 22393), (1371, 14847), (2121, 9597), (3199, 6363), (4113, 4949)]