21297890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{271}}^2$

素因数の和:578

約数の個数: 24

約数和(自身を含む): 39805020

約数和(自身を除く): 18507130

約数列:

[1, 2, 5, 10, 29, 58, 145, 271, 290, 542, 1355, 2710, 7859, 15718, 39295, 73441, 78590, 146882, 367205, 734410, 2129789, 4259578, 10648945, 21297890]

約数ペア:

[(1, 21297890), (2, 10648945), (5, 4259578), (10, 2129789), (29, 734410), (58, 367205), (145, 146882), (271, 78590), (290, 73441), (542, 39295), (1355, 15718), (2710, 7859)]