19889840

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4691}}^1$

素因数の和:4757

約数の個数: 40

約数和(自身を含む): 47126448

約数和(自身を除く): 27236608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4691, 9382, 18764, 23455, 37528, 46910, 75056, 93820, 187640, 248623, 375280, 497246, 994492, 1243115, 1988984, 2486230, 3977968, 4972460, 9944920, 19889840]

約数ペア:

[(1, 19889840), (2, 9944920), (4, 4972460), (5, 3977968), (8, 2486230), (10, 1988984), (16, 1243115), (20, 994492), (40, 497246), (53, 375280), (80, 248623), (106, 187640), (212, 93820), (265, 75056), (424, 46910), (530, 37528), (848, 23455), (1060, 18764), (2120, 9382), (4240, 4691)]