20682280

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3947}}^1$

素因数の和:4089

約数の個数: 32

約数和(自身を含む): 46902240

約数和(自身を除く): 26219960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3947, 5240, 7894, 15788, 19735, 31576, 39470, 78940, 157880, 517057, 1034114, 2068228, 2585285, 4136456, 5170570, 10341140, 20682280]

約数ペア:

[(1, 20682280), (2, 10341140), (4, 5170570), (5, 4136456), (8, 2585285), (10, 2068228), (20, 1034114), (40, 517057), (131, 157880), (262, 78940), (524, 39470), (655, 31576), (1048, 19735), (1310, 15788), (2620, 7894), (3947, 5240)]