20809712

素因数分解:

$2^4\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1$

素因数の和:179

約数の個数: 120

約数和(自身を含む): 54282240

約数和(自身を除く): 33472528

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 19, 22, 28, 38, 44, 49, 56, 76, 77, 88, 98, 112, 127, 133, 152, 154, 176, 196, 209, 254, 266, 304, 308, 392, 418, 508, 532, 539, 616, 784, 836, 889, 931, 1016, 1064, 1078, 1232, 1397, 1463, 1672, 1778, 1862, 2032, 2128, 2156, 2413, 2794, 2926, 3344, 3556, 3724, 4312, 4826, 5588, 5852, 6223, 7112, 7448, 8624, 9652, 9779, 10241, 11176, 11704, 12446, 14224, 14896, 16891, 19304, 19558, 20482, 22352, 23408, 24892, 26543, 33782, 38608, 39116, 40964, 49784, 53086, 67564, 68453, 78232, 81928, 99568, 106172, 118237, 135128, 136906, 156464, 163856, 185801, 212344, 236474, 270256, 273812, 371602, 424688, 472948, 547624, 743204, 945896, 1095248, 1300607, 1486408, 1891792, 2601214, 2972816, 5202428, 10404856, 20809712]

約数ペア:

[(1, 20809712), (2, 10404856), (4, 5202428), (7, 2972816), (8, 2601214), (11, 1891792), (14, 1486408), (16, 1300607), (19, 1095248), (22, 945896), (28, 743204), (38, 547624), (44, 472948), (49, 424688), (56, 371602), (76, 273812), (77, 270256), (88, 236474), (98, 212344), (112, 185801), (127, 163856), (133, 156464), (152, 136906), (154, 135128), (176, 118237), (196, 106172), (209, 99568), (254, 81928), (266, 78232), (304, 68453), (308, 67564), (392, 53086), (418, 49784), (508, 40964), (532, 39116), (539, 38608), (616, 33782), (784, 26543), (836, 24892), (889, 23408), (931, 22352), (1016, 20482), (1064, 19558), (1078, 19304), (1232, 16891), (1397, 14896), (1463, 14224), (1672, 12446), (1778, 11704), (1862, 11176), (2032, 10241), (2128, 9779), (2156, 9652), (2413, 8624), (2794, 7448), (2926, 7112), (3344, 6223), (3556, 5852), (3724, 5588), (4312, 4826)]