19660986

素因数分解:

$2^1\times 3^2\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{557}}^1$

素因数の和:655

約数の個数: 48

約数和(自身を含む): 44655624

約数和(自身を除く): 24994638

約数列:

[1, 2, 3, 6, 9, 18, 37, 53, 74, 106, 111, 159, 222, 318, 333, 477, 557, 666, 954, 1114, 1671, 1961, 3342, 3922, 5013, 5883, 10026, 11766, 17649, 20609, 29521, 35298, 41218, 59042, 61827, 88563, 123654, 177126, 185481, 265689, 370962, 531378, 1092277, 2184554, 3276831, 6553662, 9830493, 19660986]

約数ペア:

[(1, 19660986), (2, 9830493), (3, 6553662), (6, 3276831), (9, 2184554), (18, 1092277), (37, 531378), (53, 370962), (74, 265689), (106, 185481), (111, 177126), (159, 123654), (222, 88563), (318, 61827), (333, 59042), (477, 41218), (557, 35298), (666, 29521), (954, 20609), (1114, 17649), (1671, 11766), (1961, 10026), (3342, 5883), (3922, 5013)]