21307390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{653}}^1$

素因数の和:924

約数の個数: 32

約数和(自身を含む): 41531616

約数和(自身を除く): 20224226

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 251, 502, 653, 1255, 1306, 2510, 3263, 3265, 6526, 6530, 8489, 16315, 16978, 32630, 42445, 84890, 163903, 327806, 819515, 1639030, 2130739, 4261478, 10653695, 21307390]

約数ペア:

[(1, 21307390), (2, 10653695), (5, 4261478), (10, 2130739), (13, 1639030), (26, 819515), (65, 327806), (130, 163903), (251, 84890), (502, 42445), (653, 32630), (1255, 16978), (1306, 16315), (2510, 8489), (3263, 6530), (3265, 6526)]