21283120

素因数分解:

$2^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1193}}^1$

素因数の和:1429

約数の個数: 40

約数和(自身を含む): 49746816

約数和(自身を除く): 28463696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223, 446, 892, 1115, 1193, 1784, 2230, 2386, 3568, 4460, 4772, 5965, 8920, 9544, 11930, 17840, 19088, 23860, 47720, 95440, 266039, 532078, 1064156, 1330195, 2128312, 2660390, 4256624, 5320780, 10641560, 21283120]

約数ペア:

[(1, 21283120), (2, 10641560), (4, 5320780), (5, 4256624), (8, 2660390), (10, 2128312), (16, 1330195), (20, 1064156), (40, 532078), (80, 266039), (223, 95440), (446, 47720), (892, 23860), (1115, 19088), (1193, 17840), (1784, 11930), (2230, 9544), (2386, 8920), (3568, 5965), (4460, 4772)]