21389914

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{557}}^1$

素因数の和:790

約数の個数: 32

約数和(自身を含む): 39747456

約数和(自身を除く): 18357542

約数列:

[1, 2, 7, 13, 14, 26, 91, 182, 211, 422, 557, 1114, 1477, 2743, 2954, 3899, 5486, 7241, 7798, 14482, 19201, 38402, 50687, 101374, 117527, 235054, 822689, 1527851, 1645378, 3055702, 10694957, 21389914]

約数ペア:

[(1, 21389914), (2, 10694957), (7, 3055702), (13, 1645378), (14, 1527851), (26, 822689), (91, 235054), (182, 117527), (211, 101374), (422, 50687), (557, 38402), (1114, 19201), (1477, 14482), (2743, 7798), (2954, 7241), (3899, 5486)]