20815120

素因数分解:

$2^4\times 5^1\times {\mathrm{260189}}^1$

素因数の和:260202

約数の個数: 20

約数和(自身を含む): 48395340

約数和(自身を除く): 27580220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260189, 520378, 1040756, 1300945, 2081512, 2601890, 4163024, 5203780, 10407560, 20815120]

約数ペア:

[(1, 20815120), (2, 10407560), (4, 5203780), (5, 4163024), (8, 2601890), (10, 2081512), (16, 1300945), (20, 1040756), (40, 520378), (80, 260189)]