21217748

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{281}}^1\times {\mathrm{439}}^1$

素因数の和:767

約数の個数: 24

約数和(自身を含む): 38216640

約数和(自身を除く): 16998892

約数列:

[1, 2, 4, 43, 86, 172, 281, 439, 562, 878, 1124, 1756, 12083, 18877, 24166, 37754, 48332, 75508, 123359, 246718, 493436, 5304437, 10608874, 21217748]

約数ペア:

[(1, 21217748), (2, 10608874), (4, 5304437), (43, 493436), (86, 246718), (172, 123359), (281, 75508), (439, 48332), (562, 37754), (878, 24166), (1124, 18877), (1756, 12083)]