21000786608

素因数分解:

$2^4\times {\mathrm{811}}^1\times {\mathrm{1618433}}^1$

素因数の和:1619252

約数の個数: 20

約数和(自身を含む): 40739220648

約数和(自身を除く): 19738434040

約数列:

[1, 2, 4, 8, 16, 811, 1622, 3244, 6488, 12976, 1618433, 3236866, 6473732, 12947464, 25894928, 1312549163, 2625098326, 5250196652, 10500393304, 21000786608]

約数ペア:

[(1, 21000786608), (2, 10500393304), (4, 5250196652), (8, 2625098326), (16, 1312549163), (811, 25894928), (1622, 12947464), (3244, 6473732), (6488, 3236866), (12976, 1618433)]