278356

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:171

約数の個数: 24

約数和(自身を含む): 539784

約数和(自身を除く): 261428

約数列:

[1, 2, 4, 13, 26, 52, 53, 101, 106, 202, 212, 404, 689, 1313, 1378, 2626, 2756, 5252, 5353, 10706, 21412, 69589, 139178, 278356]

約数ペア:

[(1, 278356), (2, 139178), (4, 69589), (13, 21412), (26, 10706), (52, 5353), (53, 5252), (101, 2756), (106, 2626), (202, 1378), (212, 1313), (404, 689)]