18910480

素因数分解:

$2^4\times 5^1\times {\mathrm{236381}}^1$

素因数の和:236394

約数の個数: 20

約数和(自身を含む): 43967052

約数和(自身を除く): 25056572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 236381, 472762, 945524, 1181905, 1891048, 2363810, 3782096, 4727620, 9455240, 18910480]

約数ペア:

[(1, 18910480), (2, 9455240), (4, 4727620), (5, 3782096), (8, 2363810), (10, 1891048), (16, 1181905), (20, 945524), (40, 472762), (80, 236381)]