21735880

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{1039}}^1$

素因数の和:1573

約数の個数: 32

約数和(自身を含む): 49046400

約数和(自身を除く): 27310520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1039, 1046, 2078, 2092, 2615, 4156, 4184, 5195, 5230, 8312, 10390, 10460, 20780, 20920, 41560, 543397, 1086794, 2173588, 2716985, 4347176, 5433970, 10867940, 21735880]

約数ペア:

[(1, 21735880), (2, 10867940), (4, 5433970), (5, 4347176), (8, 2716985), (10, 2173588), (20, 1086794), (40, 543397), (523, 41560), (1039, 20920), (1046, 20780), (2078, 10460), (2092, 10390), (2615, 8312), (4156, 5230), (4184, 5195)]