21515263

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{223}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 27578880

約数和(自身を除く): 6063617

約数列:

[1, 7, 11, 49, 77, 179, 223, 539, 1253, 1561, 1969, 2453, 8771, 10927, 13783, 17171, 39917, 96481, 120197, 279419, 439087, 1955933, 3073609, 21515263]

約数ペア:

[(1, 21515263), (7, 3073609), (11, 1955933), (49, 439087), (77, 279419), (179, 120197), (223, 96481), (539, 39917), (1253, 17171), (1561, 13783), (1969, 10927), (2453, 8771)]