21181916

素因数分解:

$2^2\times 7^2\times {\mathrm{67}}^1\times {\mathrm{1613}}^1$

素因数の和:1698

約数の個数: 36

約数和(自身を含む): 43791048

約数和(自身を除く): 22609132

約数列:

[1, 2, 4, 7, 14, 28, 49, 67, 98, 134, 196, 268, 469, 938, 1613, 1876, 3226, 3283, 6452, 6566, 11291, 13132, 22582, 45164, 79037, 108071, 158074, 216142, 316148, 432284, 756497, 1512994, 3025988, 5295479, 10590958, 21181916]

約数ペア:

[(1, 21181916), (2, 10590958), (4, 5295479), (7, 3025988), (14, 1512994), (28, 756497), (49, 432284), (67, 316148), (98, 216142), (134, 158074), (196, 108071), (268, 79037), (469, 45164), (938, 22582), (1613, 13132), (1876, 11291), (3226, 6566), (3283, 6452)]