80778320

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{144247}}^1$

素因数の和:144267

約数の個数: 40

約数和(自身を含む): 214641024

約数和(自身を除く): 133862704

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 144247, 288494, 576988, 721235, 1009729, 1153976, 1442470, 2019458, 2307952, 2884940, 4038916, 5048645, 5769880, 8077832, 10097290, 11539760, 16155664, 20194580, 40389160, 80778320]

約数ペア:

[(1, 80778320), (2, 40389160), (4, 20194580), (5, 16155664), (7, 11539760), (8, 10097290), (10, 8077832), (14, 5769880), (16, 5048645), (20, 4038916), (28, 2884940), (35, 2307952), (40, 2019458), (56, 1442470), (70, 1153976), (80, 1009729), (112, 721235), (140, 576988), (280, 288494), (560, 144247)]