20900080

素因数分解:

$2^4\times 5^1\times {\mathrm{261251}}^1$

素因数の和:261264

約数の個数: 20

約数和(自身を含む): 48592872

約数和(自身を除く): 27692792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261251, 522502, 1045004, 1306255, 2090008, 2612510, 4180016, 5225020, 10450040, 20900080]

約数ペア:

[(1, 20900080), (2, 10450040), (4, 5225020), (5, 4180016), (8, 2612510), (10, 2090008), (16, 1306255), (20, 1045004), (40, 522502), (80, 261251)]