20523728

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1297}}^1$

素因数の和:1371

約数の個数: 40

約数和(自身を含む): 42491328

約数和(自身を除く): 21967600

約数列:

[1, 2, 4, 8, 16, 23, 43, 46, 86, 92, 172, 184, 344, 368, 688, 989, 1297, 1978, 2594, 3956, 5188, 7912, 10376, 15824, 20752, 29831, 55771, 59662, 111542, 119324, 223084, 238648, 446168, 477296, 892336, 1282733, 2565466, 5130932, 10261864, 20523728]

約数ペア:

[(1, 20523728), (2, 10261864), (4, 5130932), (8, 2565466), (16, 1282733), (23, 892336), (43, 477296), (46, 446168), (86, 238648), (92, 223084), (172, 119324), (184, 111542), (344, 59662), (368, 55771), (688, 29831), (989, 20752), (1297, 15824), (1978, 10376), (2594, 7912), (3956, 5188)]