21538935

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{821}}^1$

素因数の和:896

約数の個数: 48

約数和(自身を含む): 41547168

約数和(自身を除く): 20008233

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 53, 55, 99, 159, 165, 265, 477, 495, 583, 795, 821, 1749, 2385, 2463, 2915, 4105, 5247, 7389, 8745, 9031, 12315, 26235, 27093, 36945, 43513, 45155, 81279, 130539, 135465, 217565, 391617, 406395, 478643, 652695, 1435929, 1958085, 2393215, 4307787, 7179645, 21538935]

約数ペア:

[(1, 21538935), (3, 7179645), (5, 4307787), (9, 2393215), (11, 1958085), (15, 1435929), (33, 652695), (45, 478643), (53, 406395), (55, 391617), (99, 217565), (159, 135465), (165, 130539), (265, 81279), (477, 45155), (495, 43513), (583, 36945), (795, 27093), (821, 26235), (1749, 12315), (2385, 9031), (2463, 8745), (2915, 7389), (4105, 5247)]