20648516

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1049}}^1$

素因数の和:1116

約数の個数: 48

約数和(自身を含む): 44688000

約数和(自身を除く): 24039484

約数列:

[1, 2, 4, 7, 14, 19, 28, 37, 38, 74, 76, 133, 148, 259, 266, 518, 532, 703, 1036, 1049, 1406, 2098, 2812, 4196, 4921, 7343, 9842, 14686, 19684, 19931, 29372, 38813, 39862, 77626, 79724, 139517, 155252, 271691, 279034, 543382, 558068, 737447, 1086764, 1474894, 2949788, 5162129, 10324258, 20648516]

約数ペア:

[(1, 20648516), (2, 10324258), (4, 5162129), (7, 2949788), (14, 1474894), (19, 1086764), (28, 737447), (37, 558068), (38, 543382), (74, 279034), (76, 271691), (133, 155252), (148, 139517), (259, 79724), (266, 77626), (518, 39862), (532, 38813), (703, 29372), (1036, 19931), (1049, 19684), (1406, 14686), (2098, 9842), (2812, 7343), (4196, 4921)]