21991390

素因数分解:

$2^1\times 5^1\times {\mathrm{937}}^1\times {\mathrm{2347}}^1$

素因数の和:3291

約数の個数: 16

約数和(自身を含む): 39643632

約数和(自身を除く): 17652242

約数列:

[1, 2, 5, 10, 937, 1874, 2347, 4685, 4694, 9370, 11735, 23470, 2199139, 4398278, 10995695, 21991390]

約数ペア:

[(1, 21991390), (2, 10995695), (5, 4398278), (10, 2199139), (937, 23470), (1874, 11735), (2347, 9370), (4685, 4694)]