20987818

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{709}}^1$

素因数の和:790

約数の個数: 24

約数和(自身を含む): 34084260

約数和(自身を除く): 13096442

約数列:

[1, 2, 19, 38, 41, 82, 361, 709, 722, 779, 1418, 1558, 13471, 14801, 26942, 29069, 29602, 58138, 255949, 511898, 552311, 1104622, 10493909, 20987818]

約数ペア:

[(1, 20987818), (2, 10493909), (19, 1104622), (38, 552311), (41, 511898), (82, 255949), (361, 58138), (709, 29602), (722, 29069), (779, 26942), (1418, 14801), (1558, 13471)]