128722840

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{12821}}^1$

素因数の和:13083

約数の個数: 32

約数和(自身を含む): 290802960

約数和(自身を除く): 162080120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 5020, 10040, 12821, 25642, 51284, 64105, 102568, 128210, 256420, 512840, 3218071, 6436142, 12872284, 16090355, 25744568, 32180710, 64361420, 128722840]

約数ペア:

[(1, 128722840), (2, 64361420), (4, 32180710), (5, 25744568), (8, 16090355), (10, 12872284), (20, 6436142), (40, 3218071), (251, 512840), (502, 256420), (1004, 128210), (1255, 102568), (2008, 64105), (2510, 51284), (5020, 25642), (10040, 12821)]