21197253

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13109}}^1$

素因数の和:13137

約数の個数: 24

約数和(自身を含む): 35868960

約数和(自身を除く): 14671707

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 13109, 39327, 91763, 144199, 275289, 432597, 642341, 1009393, 1927023, 3028179, 7065751, 21197253]

約数ペア:

[(1, 21197253), (3, 7065751), (7, 3028179), (11, 1927023), (21, 1009393), (33, 642341), (49, 432597), (77, 275289), (147, 144199), (231, 91763), (539, 39327), (1617, 13109)]