20980036

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1$

素因数の和:329

約数の個数: 72

約数和(自身を含む): 48033216

約数和(自身を除く): 27053180

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 37, 44, 49, 74, 77, 98, 148, 154, 196, 259, 263, 308, 407, 518, 526, 539, 814, 1036, 1052, 1078, 1628, 1813, 1841, 2156, 2849, 2893, 3626, 3682, 5698, 5786, 7252, 7364, 9731, 11396, 11572, 12887, 19462, 19943, 20251, 25774, 38924, 39886, 40502, 51548, 68117, 79772, 81004, 107041, 136234, 141757, 214082, 272468, 283514, 428164, 476819, 567028, 749287, 953638, 1498574, 1907276, 2997148, 5245009, 10490018, 20980036]

約数ペア:

[(1, 20980036), (2, 10490018), (4, 5245009), (7, 2997148), (11, 1907276), (14, 1498574), (22, 953638), (28, 749287), (37, 567028), (44, 476819), (49, 428164), (74, 283514), (77, 272468), (98, 214082), (148, 141757), (154, 136234), (196, 107041), (259, 81004), (263, 79772), (308, 68117), (407, 51548), (518, 40502), (526, 39886), (539, 38924), (814, 25774), (1036, 20251), (1052, 19943), (1078, 19462), (1628, 12887), (1813, 11572), (1841, 11396), (2156, 9731), (2849, 7364), (2893, 7252), (3626, 5786), (3682, 5698)]