399560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{1427}}^1$

素因数の和:1445

約数の個数: 32

約数和(自身を含む): 1028160

約数和(自身を除く): 628600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 1427, 2854, 5708, 7135, 9989, 11416, 14270, 19978, 28540, 39956, 49945, 57080, 79912, 99890, 199780, 399560]

約数ペア:

[(1, 399560), (2, 199780), (4, 99890), (5, 79912), (7, 57080), (8, 49945), (10, 39956), (14, 28540), (20, 19978), (28, 14270), (35, 11416), (40, 9989), (56, 7135), (70, 5708), (140, 2854), (280, 1427)]