21091395

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108161}}^1$

素因数の和:108182

約数の個数: 16

約数和(自身を含む): 36342432

約数和(自身を除く): 15251037

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 108161, 324483, 540805, 1406093, 1622415, 4218279, 7030465, 21091395]

約数ペア:

[(1, 21091395), (3, 7030465), (5, 4218279), (13, 1622415), (15, 1406093), (39, 540805), (65, 324483), (195, 108161)]