28781084157

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{72133043}}^1$

素因数の和:72133072

約数の個数: 16

約数和(自身を含む): 46165148160

約数和(自身を除く): 17384064003

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 72133043, 216399129, 504931301, 1370527817, 1514793903, 4111583451, 9593694719, 28781084157]

約数ペア:

[(1, 28781084157), (3, 9593694719), (7, 4111583451), (19, 1514793903), (21, 1370527817), (57, 504931301), (133, 216399129), (399, 72133043)]