20461520

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1019}}^1$

素因数の和:1283

約数の個数: 40

約数和(自身を含む): 47809440

約数和(自身を除く): 27347920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1019, 1255, 2008, 2038, 2510, 4016, 4076, 5020, 5095, 8152, 10040, 10190, 16304, 20080, 20380, 40760, 81520, 255769, 511538, 1023076, 1278845, 2046152, 2557690, 4092304, 5115380, 10230760, 20461520]

約数ペア:

[(1, 20461520), (2, 10230760), (4, 5115380), (5, 4092304), (8, 2557690), (10, 2046152), (16, 1278845), (20, 1023076), (40, 511538), (80, 255769), (251, 81520), (502, 40760), (1004, 20380), (1019, 20080), (1255, 16304), (2008, 10190), (2038, 10040), (2510, 8152), (4016, 5095), (4076, 5020)]