20977864

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{2113}}^1$

素因数の和:2209

約数の個数: 32

約数和(自身を含む): 42237720

約数和(自身を除く): 21259856

約数列:

[1, 2, 4, 8, 17, 34, 68, 73, 136, 146, 292, 584, 1241, 2113, 2482, 4226, 4964, 8452, 9928, 16904, 35921, 71842, 143684, 154249, 287368, 308498, 616996, 1233992, 2622233, 5244466, 10488932, 20977864]

約数ペア:

[(1, 20977864), (2, 10488932), (4, 5244466), (8, 2622233), (17, 1233992), (34, 616996), (68, 308498), (73, 287368), (136, 154249), (146, 143684), (292, 71842), (584, 35921), (1241, 16904), (2113, 9928), (2482, 8452), (4226, 4964)]