20748520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39901}}^1$

素因数の和:39925

約数の個数: 32

約数和(自身を含む): 50276520

約数和(自身を除く): 29528000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39901, 79802, 159604, 199505, 319208, 399010, 518713, 798020, 1037426, 1596040, 2074852, 2593565, 4149704, 5187130, 10374260, 20748520]

約数ペア:

[(1, 20748520), (2, 10374260), (4, 5187130), (5, 4149704), (8, 2593565), (10, 2074852), (13, 1596040), (20, 1037426), (26, 798020), (40, 518713), (52, 399010), (65, 319208), (104, 199505), (130, 159604), (260, 79802), (520, 39901)]