81123560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289727}}^1$

素因数の和:289745

約数の個数: 32

約数和(自身を含む): 208604160

約数和(自身を除く): 127480600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289727, 579454, 1158908, 1448635, 2028089, 2317816, 2897270, 4056178, 5794540, 8112356, 10140445, 11589080, 16224712, 20280890, 40561780, 81123560]

約数ペア:

[(1, 81123560), (2, 40561780), (4, 20280890), (5, 16224712), (7, 11589080), (8, 10140445), (10, 8112356), (14, 5794540), (20, 4056178), (28, 2897270), (35, 2317816), (40, 2028089), (56, 1448635), (70, 1158908), (140, 579454), (280, 289727)]