28722813

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71987}}^1$

素因数の和:72016

約数の個数: 16

約数和(自身を含む): 46072320

約数和(自身を除く): 17349507

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 71987, 215961, 503909, 1367753, 1511727, 4103259, 9574271, 28722813]

約数ペア:

[(1, 28722813), (3, 9574271), (7, 4103259), (19, 1511727), (21, 1367753), (57, 503909), (133, 215961), (399, 71987)]