21391130

素因数分解:

$2^1\times 5^1\times {\mathrm{971}}^1\times {\mathrm{2203}}^1$

素因数の和:3181

約数の個数: 16

約数和(自身を含む): 38561184

約数和(自身を除く): 17170054

約数列:

[1, 2, 5, 10, 971, 1942, 2203, 4406, 4855, 9710, 11015, 22030, 2139113, 4278226, 10695565, 21391130]

約数ペア:

[(1, 21391130), (2, 10695565), (5, 4278226), (10, 2139113), (971, 22030), (1942, 11015), (2203, 9710), (4406, 4855)]