21221391

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{1319}}^1$

素因数の和:1526

約数の個数: 16

約数和(自身を含む): 29399040

約数和(自身を除く): 8177649

約数列:

[1, 3, 31, 93, 173, 519, 1319, 3957, 5363, 16089, 40889, 122667, 228187, 684561, 7073797, 21221391]

約数ペア:

[(1, 21221391), (3, 7073797), (31, 684561), (93, 228187), (173, 122667), (519, 40889), (1319, 16089), (3957, 5363)]