20478188

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 18894292

約数列:

[1, 2, 4, 23, 41, 46, 61, 82, 89, 92, 122, 164, 178, 244, 356, 943, 1403, 1886, 2047, 2501, 2806, 3649, 3772, 4094, 5002, 5429, 5612, 7298, 8188, 10004, 10858, 14596, 21716, 57523, 83927, 115046, 124867, 167854, 222589, 230092, 249734, 335708, 445178, 499468, 890356, 5119547, 10239094, 20478188]

約数ペア:

[(1, 20478188), (2, 10239094), (4, 5119547), (23, 890356), (41, 499468), (46, 445178), (61, 335708), (82, 249734), (89, 230092), (92, 222589), (122, 167854), (164, 124867), (178, 115046), (244, 83927), (356, 57523), (943, 21716), (1403, 14596), (1886, 10858), (2047, 10004), (2501, 8188), (2806, 7298), (3649, 5612), (3772, 5429), (4094, 5002)]