20157680

素因数分解:

$2^4\times 5^1\times {\mathrm{251971}}^1$

素因数の和:251984

約数の個数: 20

約数和(自身を含む): 46866792

約数和(自身を除く): 26709112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251971, 503942, 1007884, 1259855, 2015768, 2519710, 4031536, 5039420, 10078840, 20157680]

約数ペア:

[(1, 20157680), (2, 10078840), (4, 5039420), (5, 4031536), (8, 2519710), (10, 2015768), (16, 1259855), (20, 1007884), (40, 503942), (80, 251971)]