721840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{1289}}^1$

素因数の和:1309

約数の個数: 40

約数和(自身を含む): 1919520

約数和(自身を除く): 1197680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 1289, 2578, 5156, 6445, 9023, 10312, 12890, 18046, 20624, 25780, 36092, 45115, 51560, 72184, 90230, 103120, 144368, 180460, 360920, 721840]

約数ペア:

[(1, 721840), (2, 360920), (4, 180460), (5, 144368), (7, 103120), (8, 90230), (10, 72184), (14, 51560), (16, 45115), (20, 36092), (28, 25780), (35, 20624), (40, 18046), (56, 12890), (70, 10312), (80, 9023), (112, 6445), (140, 5156), (280, 2578), (560, 1289)]