21000978868

素因数分解:

$2^2\times {\mathrm{10477}}^1\times {\mathrm{501121}}^1$

素因数の和:511602

約数の個数: 12

約数和(自身を含む): 36755294212

約数和(自身を除く): 15754315344

約数列:

[1, 2, 4, 10477, 20954, 41908, 501121, 1002242, 2004484, 5250244717, 10500489434, 21000978868]

約数ペア:

[(1, 21000978868), (2, 10500489434), (4, 5250244717), (10477, 2004484), (20954, 1002242), (41908, 501121)]