21904820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3329}}^1$

素因数の和:3392

約数の個数: 48

約数和(自身を含む): 53706240

約数和(自身を除く): 31801420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3290, 3329, 6580, 6658, 13316, 16645, 23303, 33290, 46606, 66580, 93212, 116515, 156463, 233030, 312926, 466060, 625852, 782315, 1095241, 1564630, 2190482, 3129260, 4380964, 5476205, 10952410, 21904820]

約数ペア:

[(1, 21904820), (2, 10952410), (4, 5476205), (5, 4380964), (7, 3129260), (10, 2190482), (14, 1564630), (20, 1095241), (28, 782315), (35, 625852), (47, 466060), (70, 312926), (94, 233030), (140, 156463), (188, 116515), (235, 93212), (329, 66580), (470, 46606), (658, 33290), (940, 23303), (1316, 16645), (1645, 13316), (3290, 6658), (3329, 6580)]