21618212

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 49488768

約数和(自身を除く): 27870556

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 37, 44, 49, 74, 77, 98, 148, 154, 196, 259, 271, 308, 407, 518, 539, 542, 814, 1036, 1078, 1084, 1628, 1813, 1897, 2156, 2849, 2981, 3626, 3794, 5698, 5962, 7252, 7588, 10027, 11396, 11924, 13279, 19943, 20054, 20867, 26558, 39886, 40108, 41734, 53116, 70189, 79772, 83468, 110297, 140378, 146069, 220594, 280756, 292138, 441188, 491323, 584276, 772079, 982646, 1544158, 1965292, 3088316, 5404553, 10809106, 21618212]

約数ペア:

[(1, 21618212), (2, 10809106), (4, 5404553), (7, 3088316), (11, 1965292), (14, 1544158), (22, 982646), (28, 772079), (37, 584276), (44, 491323), (49, 441188), (74, 292138), (77, 280756), (98, 220594), (148, 146069), (154, 140378), (196, 110297), (259, 83468), (271, 79772), (308, 70189), (407, 53116), (518, 41734), (539, 40108), (542, 39886), (814, 26558), (1036, 20867), (1078, 20054), (1084, 19943), (1628, 13279), (1813, 11924), (1897, 11396), (2156, 10027), (2849, 7588), (2981, 7252), (3626, 5962), (3794, 5698)]