20972968

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{154213}}^1$

素因数の和:154236

約数の個数: 16

約数和(自身を含む): 41637780

約数和(自身を除く): 20664812

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 154213, 308426, 616852, 1233704, 2621621, 5243242, 10486484, 20972968]

約数ペア:

[(1, 20972968), (2, 10486484), (4, 5243242), (8, 2621621), (17, 1233704), (34, 616852), (68, 308426), (136, 154213)]