21056816

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{661}}^1$

素因数の和:861

約数の個数: 40

約数和(自身を含む): 44820048

約数和(自身を除く): 23763232

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 181, 362, 661, 724, 1322, 1448, 1991, 2644, 2896, 3982, 5288, 7271, 7964, 10576, 14542, 15928, 29084, 31856, 58168, 116336, 119641, 239282, 478564, 957128, 1316051, 1914256, 2632102, 5264204, 10528408, 21056816]

約数ペア:

[(1, 21056816), (2, 10528408), (4, 5264204), (8, 2632102), (11, 1914256), (16, 1316051), (22, 957128), (44, 478564), (88, 239282), (176, 119641), (181, 116336), (362, 58168), (661, 31856), (724, 29084), (1322, 15928), (1448, 14542), (1991, 10576), (2644, 7964), (2896, 7271), (3982, 5288)]