1260020

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^2$

素因数の和:511

約数の個数: 18

約数和(自身を含む): 2656626

約数和(自身を除く): 1396606

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 5020, 63001, 126002, 252004, 315005, 630010, 1260020]

約数ペア:

[(1, 1260020), (2, 630010), (4, 315005), (5, 252004), (10, 126002), (20, 63001), (251, 5020), (502, 2510), (1004, 1255)]