20156040440

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1256611}}^1$

素因数の和:1257023

約数の個数: 32

約数和(自身を含む): 45464222160

約数和(自身を除く): 25308181720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 8020, 16040, 1256611, 2513222, 5026444, 6283055, 10052888, 12566110, 25132220, 50264440, 503901011, 1007802022, 2015604044, 2519505055, 4031208088, 5039010110, 10078020220, 20156040440]

約数ペア:

[(1, 20156040440), (2, 10078020220), (4, 5039010110), (5, 4031208088), (8, 2519505055), (10, 2015604044), (20, 1007802022), (40, 503901011), (401, 50264440), (802, 25132220), (1604, 12566110), (2005, 10052888), (3208, 6283055), (4010, 5026444), (8020, 2513222), (16040, 1256611)]