21240220

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{28703}}^1$

素因数の和:28749

約数の個数: 24

約数和(自身を含む): 45811584

約数和(自身を除く): 24571364

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 28703, 57406, 114812, 143515, 287030, 574060, 1062011, 2124022, 4248044, 5310055, 10620110, 21240220]

約数ペア:

[(1, 21240220), (2, 10620110), (4, 5310055), (5, 4248044), (10, 2124022), (20, 1062011), (37, 574060), (74, 287030), (148, 143515), (185, 114812), (370, 57406), (740, 28703)]