81080360

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{20897}}^1$

素因数の和:21005

約数の個数: 32

約数和(自身を含む): 184320360

約数和(自身を除く): 103240000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 20897, 41794, 83588, 104485, 167176, 208970, 417940, 835880, 2027009, 4054018, 8108036, 10135045, 16216072, 20270090, 40540180, 81080360]

約数ペア:

[(1, 81080360), (2, 40540180), (4, 20270090), (5, 16216072), (8, 10135045), (10, 8108036), (20, 4054018), (40, 2027009), (97, 835880), (194, 417940), (388, 208970), (485, 167176), (776, 104485), (970, 83588), (1940, 41794), (3880, 20897)]