21000514840

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7836013}}^1$

素因数の和:7836091

約数の個数: 32

約数和(自身を含む): 47956405680

約数和(自身を除く): 26955890840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7836013, 15672026, 31344052, 39180065, 62688104, 78360130, 156720260, 313440520, 525012871, 1050025742, 2100051484, 2625064355, 4200102968, 5250128710, 10500257420, 21000514840]

約数ペア:

[(1, 21000514840), (2, 10500257420), (4, 5250128710), (5, 4200102968), (8, 2625064355), (10, 2100051484), (20, 1050025742), (40, 525012871), (67, 313440520), (134, 156720260), (268, 78360130), (335, 62688104), (536, 39180065), (670, 31344052), (1340, 15672026), (2680, 7836013)]