21000497008

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{18486353}}^1$

素因数の和:18486432

約数の個数: 20

約数和(自身を含む): 41261542128

約数和(自身を除く): 20261045120

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 18486353, 36972706, 73945412, 147890824, 295781648, 1312531063, 2625062126, 5250124252, 10500248504, 21000497008]

約数ペア:

[(1, 21000497008), (2, 10500248504), (4, 5250124252), (8, 2625062126), (16, 1312531063), (71, 295781648), (142, 147890824), (284, 73945412), (568, 36972706), (1136, 18486353)]