21428211

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{311}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 34864128

約数和(自身を除く): 13435917

約数列:

[1, 3, 7, 17, 21, 51, 119, 193, 311, 357, 579, 933, 1351, 2177, 3281, 4053, 5287, 6531, 9843, 15861, 22967, 37009, 60023, 68901, 111027, 180069, 420161, 1020391, 1260483, 3061173, 7142737, 21428211]

約数ペア:

[(1, 21428211), (3, 7142737), (7, 3061173), (17, 1260483), (21, 1020391), (51, 420161), (119, 180069), (193, 111027), (311, 68901), (357, 60023), (579, 37009), (933, 22967), (1351, 15861), (2177, 9843), (3281, 6531), (4053, 5287)]