20721835480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{373501}}^1$

素因数の和:373604

約数の個数: 64

約数和(自身を含む): 49750466400

約数和(自身を除く): 29028630920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 73, 76, 95, 146, 152, 190, 292, 365, 380, 584, 730, 760, 1387, 1460, 2774, 2920, 5548, 6935, 11096, 13870, 27740, 55480, 373501, 747002, 1494004, 1867505, 2988008, 3735010, 7096519, 7470020, 14193038, 14940040, 27265573, 28386076, 35482595, 54531146, 56772152, 70965190, 109062292, 136327865, 141930380, 218124584, 272655730, 283860760, 518045887, 545311460, 1036091774, 1090622920, 2072183548, 2590229435, 4144367096, 5180458870, 10360917740, 20721835480]

約数ペア:

[(1, 20721835480), (2, 10360917740), (4, 5180458870), (5, 4144367096), (8, 2590229435), (10, 2072183548), (19, 1090622920), (20, 1036091774), (38, 545311460), (40, 518045887), (73, 283860760), (76, 272655730), (95, 218124584), (146, 141930380), (152, 136327865), (190, 109062292), (292, 70965190), (365, 56772152), (380, 54531146), (584, 35482595), (730, 28386076), (760, 27265573), (1387, 14940040), (1460, 14193038), (2774, 7470020), (2920, 7096519), (5548, 3735010), (6935, 2988008), (11096, 1867505), (13870, 1494004), (27740, 747002), (55480, 373501)]