320560

素因数分解:

$2^4\times 5^1\times {\mathrm{4007}}^1$

素因数の和:4020

約数の個数: 20

約数和(自身を含む): 745488

約数和(自身を除く): 424928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4007, 8014, 16028, 20035, 32056, 40070, 64112, 80140, 160280, 320560]

約数ペア:

[(1, 320560), (2, 160280), (4, 80140), (5, 64112), (8, 40070), (10, 32056), (16, 20035), (20, 16028), (40, 8014), (80, 4007)]