646643840

素因数分解:

$2^7\times 5^1\times {\mathrm{1010381}}^1$

素因数の和:1010400

約数の個数: 32

約数和(自身を含む): 1545884460

約数和(自身を除く): 899240620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 1010381, 2020762, 4041524, 5051905, 8083048, 10103810, 16166096, 20207620, 32332192, 40415240, 64664384, 80830480, 129328768, 161660960, 323321920, 646643840]

約数ペア:

[(1, 646643840), (2, 323321920), (4, 161660960), (5, 129328768), (8, 80830480), (10, 64664384), (16, 40415240), (20, 32332192), (32, 20207620), (40, 16166096), (64, 10103810), (80, 8083048), (128, 5051905), (160, 4041524), (320, 2020762), (640, 1010381)]