80439940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{443}}^1\times {\mathrm{1297}}^1$

素因数の和:1756

約数の個数: 48

約数和(自身を含む): 193640832

約数和(自身を除く): 113200892

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 443, 886, 1297, 1772, 2215, 2594, 3101, 4430, 5188, 6202, 6485, 8860, 9079, 12404, 12970, 15505, 18158, 25940, 31010, 36316, 45395, 62020, 90790, 181580, 574571, 1149142, 2298284, 2872855, 4021997, 5745710, 8043994, 11491420, 16087988, 20109985, 40219970, 80439940]

約数ペア:

[(1, 80439940), (2, 40219970), (4, 20109985), (5, 16087988), (7, 11491420), (10, 8043994), (14, 5745710), (20, 4021997), (28, 2872855), (35, 2298284), (70, 1149142), (140, 574571), (443, 181580), (886, 90790), (1297, 62020), (1772, 45395), (2215, 36316), (2594, 31010), (3101, 25940), (4430, 18158), (5188, 15505), (6202, 12970), (6485, 12404), (8860, 9079)]