21059560

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4019}}^1$

素因数の和:4161

約数の個数: 32

約数和(自身を含む): 47757600

約数和(自身を除く): 26698040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4019, 5240, 8038, 16076, 20095, 32152, 40190, 80380, 160760, 526489, 1052978, 2105956, 2632445, 4211912, 5264890, 10529780, 21059560]

約数ペア:

[(1, 21059560), (2, 10529780), (4, 5264890), (5, 4211912), (8, 2632445), (10, 2105956), (20, 1052978), (40, 526489), (131, 160760), (262, 80380), (524, 40190), (655, 32152), (1048, 20095), (1310, 16076), (2620, 8038), (4019, 5240)]