18989840

素因数分解:

$2^4\times 5^1\times {\mathrm{237373}}^1$

素因数の和:237386

約数の個数: 20

約数和(自身を含む): 44151564

約数和(自身を除く): 25161724

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237373, 474746, 949492, 1186865, 1898984, 2373730, 3797968, 4747460, 9494920, 18989840]

約数ペア:

[(1, 18989840), (2, 9494920), (4, 4747460), (5, 3797968), (8, 2373730), (10, 1898984), (16, 1186865), (20, 949492), (40, 474746), (80, 237373)]