261291268

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{491149}}^1$

素因数の和:491179

約数の個数: 24

約数和(自身を含む): 550088000

約数和(自身を除く): 288796732

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 491149, 982298, 1964596, 3438043, 6876086, 9331831, 13752172, 18663662, 37327324, 65322817, 130645634, 261291268]

約数ペア:

[(1, 261291268), (2, 130645634), (4, 65322817), (7, 37327324), (14, 18663662), (19, 13752172), (28, 9331831), (38, 6876086), (76, 3438043), (133, 1964596), (266, 982298), (532, 491149)]