1561840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{2789}}^1$

素因数の和:2809

約数の個数: 40

約数和(自身を含む): 4151520

約数和(自身を除く): 2589680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 2789, 5578, 11156, 13945, 19523, 22312, 27890, 39046, 44624, 55780, 78092, 97615, 111560, 156184, 195230, 223120, 312368, 390460, 780920, 1561840]

約数ペア:

[(1, 1561840), (2, 780920), (4, 390460), (5, 312368), (7, 223120), (8, 195230), (10, 156184), (14, 111560), (16, 97615), (20, 78092), (28, 55780), (35, 44624), (40, 39046), (56, 27890), (70, 22312), (80, 19523), (112, 13945), (140, 11156), (280, 5578), (560, 2789)]