21144591

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{563}}^1$

素因数の和:692

約数の個数: 32

約数和(自身を含む): 34110720

約数和(自身を除く): 12966129

約数列:

[1, 3, 9, 13, 27, 39, 107, 117, 321, 351, 563, 963, 1391, 1689, 2889, 4173, 5067, 7319, 12519, 15201, 21957, 37557, 60241, 65871, 180723, 197613, 542169, 783133, 1626507, 2349399, 7048197, 21144591]

約数ペア:

[(1, 21144591), (3, 7048197), (9, 2349399), (13, 1626507), (27, 783133), (39, 542169), (107, 197613), (117, 180723), (321, 65871), (351, 60241), (563, 37557), (963, 21957), (1391, 15201), (1689, 12519), (2889, 7319), (4173, 5067)]