21409784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{1091}}^1$

素因数の和:1331

約数の個数: 32

約数和(自身を含む): 44029440

約数和(自身を除く): 22619656

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 223, 446, 892, 1091, 1784, 2182, 2453, 4364, 4906, 8728, 9812, 12001, 19624, 24002, 48004, 96008, 243293, 486586, 973172, 1946344, 2676223, 5352446, 10704892, 21409784]

約数ペア:

[(1, 21409784), (2, 10704892), (4, 5352446), (8, 2676223), (11, 1946344), (22, 973172), (44, 486586), (88, 243293), (223, 96008), (446, 48004), (892, 24002), (1091, 19624), (1784, 12001), (2182, 9812), (2453, 8728), (4364, 4906)]