81210920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290039}}^1$

素因数の和:290057

約数の個数: 32

約数和(自身を含む): 208828800

約数和(自身を除く): 127617880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290039, 580078, 1160156, 1450195, 2030273, 2320312, 2900390, 4060546, 5800780, 8121092, 10151365, 11601560, 16242184, 20302730, 40605460, 81210920]

約数ペア:

[(1, 81210920), (2, 40605460), (4, 20302730), (5, 16242184), (7, 11601560), (8, 10151365), (10, 8121092), (14, 5800780), (20, 4060546), (28, 2900390), (35, 2320312), (40, 2030273), (56, 1450195), (70, 1160156), (140, 580078), (280, 290039)]