21123560

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1471}}^1$

素因数の和:1841

約数の個数: 32

約数和(自身を含む): 47692800

約数和(自身を除く): 26569240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1471, 1795, 2872, 2942, 3590, 5884, 7180, 7355, 11768, 14360, 14710, 29420, 58840, 528089, 1056178, 2112356, 2640445, 4224712, 5280890, 10561780, 21123560]

約数ペア:

[(1, 21123560), (2, 10561780), (4, 5280890), (5, 4224712), (8, 2640445), (10, 2112356), (20, 1056178), (40, 528089), (359, 58840), (718, 29420), (1436, 14710), (1471, 14360), (1795, 11768), (2872, 7355), (2942, 7180), (3590, 5884)]