21719945

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 30307200

約数和(自身を除く): 8587255

約数列:

[1, 5, 13, 19, 43, 65, 95, 215, 247, 409, 559, 817, 1235, 2045, 2795, 4085, 5317, 7771, 10621, 17587, 26585, 38855, 53105, 87935, 101023, 228631, 334153, 505115, 1143155, 1670765, 4343989, 21719945]

約数ペア:

[(1, 21719945), (5, 4343989), (13, 1670765), (19, 1143155), (43, 505115), (65, 334153), (95, 228631), (215, 101023), (247, 87935), (409, 53105), (559, 38855), (817, 26585), (1235, 17587), (2045, 10621), (2795, 7771), (4085, 5317)]