20971240

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{1949}}^1$

素因数の和:2229

約数の個数: 32

約数和(自身を含む): 47385000

約数和(自身を除く): 26413760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 1949, 2152, 2690, 3898, 5380, 7796, 9745, 10760, 15592, 19490, 38980, 77960, 524281, 1048562, 2097124, 2621405, 4194248, 5242810, 10485620, 20971240]

約数ペア:

[(1, 20971240), (2, 10485620), (4, 5242810), (5, 4194248), (8, 2621405), (10, 2097124), (20, 1048562), (40, 524281), (269, 77960), (538, 38980), (1076, 19490), (1345, 15592), (1949, 10760), (2152, 9745), (2690, 7796), (3898, 5380)]