20973560

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2089}}^1$

素因数の和:2351

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26427640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2089, 2510, 4178, 5020, 8356, 10040, 10445, 16712, 20890, 41780, 83560, 524339, 1048678, 2097356, 2621695, 4194712, 5243390, 10486780, 20973560]

約数ペア:

[(1, 20973560), (2, 10486780), (4, 5243390), (5, 4194712), (8, 2621695), (10, 2097356), (20, 1048678), (40, 524339), (251, 83560), (502, 41780), (1004, 20890), (1255, 16712), (2008, 10445), (2089, 10040), (2510, 8356), (4178, 5020)]