18898780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13309}}^1$

素因数の和:13389

約数の個数: 24

約数和(自身を含む): 40249440

約数和(自身を除く): 21350660

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13309, 26618, 53236, 66545, 133090, 266180, 944939, 1889878, 3779756, 4724695, 9449390, 18898780]

約数ペア:

[(1, 18898780), (2, 9449390), (4, 4724695), (5, 3779756), (10, 1889878), (20, 944939), (71, 266180), (142, 133090), (284, 66545), (355, 53236), (710, 26618), (1420, 13309)]