21051860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25673}}^1$

素因数の和:25723

約数の個数: 24

約数和(自身を含む): 45288936

約数和(自身を除く): 24237076

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25673, 51346, 102692, 128365, 256730, 513460, 1052593, 2105186, 4210372, 5262965, 10525930, 21051860]

約数ペア:

[(1, 21051860), (2, 10525930), (4, 5262965), (5, 4210372), (10, 2105186), (20, 1052593), (41, 513460), (82, 256730), (164, 128365), (205, 102692), (410, 51346), (820, 25673)]