20689480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3889}}^1$

素因数の和:3926

約数の個数: 64

約数和(自身を含む): 56016000

約数和(自身を除く): 35326520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 3889, 5320, 7778, 15556, 19445, 27223, 31112, 38890, 54446, 73891, 77780, 108892, 136115, 147782, 155560, 217784, 272230, 295564, 369455, 517237, 544460, 591128, 738910, 1034474, 1088920, 1477820, 2068948, 2586185, 2955640, 4137896, 5172370, 10344740, 20689480]

約数ペア:

[(1, 20689480), (2, 10344740), (4, 5172370), (5, 4137896), (7, 2955640), (8, 2586185), (10, 2068948), (14, 1477820), (19, 1088920), (20, 1034474), (28, 738910), (35, 591128), (38, 544460), (40, 517237), (56, 369455), (70, 295564), (76, 272230), (95, 217784), (133, 155560), (140, 147782), (152, 136115), (190, 108892), (266, 77780), (280, 73891), (380, 54446), (532, 38890), (665, 31112), (760, 27223), (1064, 19445), (1330, 15556), (2660, 7778), (3889, 5320)]