21090260

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15739}}^1$

素因数の和:15815

約数の個数: 24

約数和(自身を含む): 44953440

約数和(自身を除く): 23863180

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15739, 31478, 62956, 78695, 157390, 314780, 1054513, 2109026, 4218052, 5272565, 10545130, 21090260]

約数ペア:

[(1, 21090260), (2, 10545130), (4, 5272565), (5, 4218052), (10, 2109026), (20, 1054513), (67, 314780), (134, 157390), (268, 78695), (335, 62956), (670, 31478), (1340, 15739)]