641120

素因数分解:

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

素因数の和:4022

約数の個数: 24

約数和(自身を含む): 1515024

約数和(自身を除く): 873904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4007, 8014, 16028, 20035, 32056, 40070, 64112, 80140, 128224, 160280, 320560, 641120]

約数ペア:

[(1, 641120), (2, 320560), (4, 160280), (5, 128224), (8, 80140), (10, 64112), (16, 40070), (20, 32056), (32, 20035), (40, 16028), (80, 8014), (160, 4007)]