21091015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7939385

約数列:

[1, 5, 11, 41, 47, 55, 199, 205, 235, 451, 517, 995, 1927, 2189, 2255, 2585, 8159, 9353, 9635, 10945, 21197, 40795, 46765, 89749, 102883, 105985, 383473, 448745, 514415, 1917365, 4218203, 21091015]

約数ペア:

[(1, 21091015), (5, 4218203), (11, 1917365), (41, 514415), (47, 448745), (55, 383473), (199, 105985), (205, 102883), (235, 89749), (451, 46765), (517, 40795), (995, 21197), (1927, 10945), (2189, 9635), (2255, 9353), (2585, 8159)]