865038640

素因数分解:

$2^4\times 5^1\times {\mathrm{10812983}}^1$

素因数の和:10812996

約数の個数: 20

約数和(自身を含む): 2011215024

約数和(自身を除く): 1146176384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 10812983, 21625966, 43251932, 54064915, 86503864, 108129830, 173007728, 216259660, 432519320, 865038640]

約数ペア:

[(1, 865038640), (2, 432519320), (4, 216259660), (5, 173007728), (8, 108129830), (10, 86503864), (16, 54064915), (20, 43251932), (40, 21625966), (80, 10812983)]