81429220

素因数分解:

$2^2\times 5^1\times {\mathrm{1949}}^1\times {\mathrm{2089}}^1$

素因数の和:4047

約数の個数: 24

約数和(自身を含む): 171171000

約数和(自身を除く): 89741780

約数列:

[1, 2, 4, 5, 10, 20, 1949, 2089, 3898, 4178, 7796, 8356, 9745, 10445, 19490, 20890, 38980, 41780, 4071461, 8142922, 16285844, 20357305, 40714610, 81429220]

約数ペア:

[(1, 81429220), (2, 40714610), (4, 20357305), (5, 16285844), (10, 8142922), (20, 4071461), (1949, 41780), (2089, 38980), (3898, 20890), (4178, 19490), (7796, 10445), (8356, 9745)]