397490020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{2087}}^1$

素因数の和:2292

約数の個数: 48

約数和(自身を含む): 852405120

約数和(自身を除く): 454915100

約数列:

[1, 2, 4, 5, 10, 20, 89, 107, 178, 214, 356, 428, 445, 535, 890, 1070, 1780, 2087, 2140, 4174, 8348, 9523, 10435, 19046, 20870, 38092, 41740, 47615, 95230, 185743, 190460, 223309, 371486, 446618, 742972, 893236, 928715, 1116545, 1857430, 2233090, 3714860, 4466180, 19874501, 39749002, 79498004, 99372505, 198745010, 397490020]

約数ペア:

[(1, 397490020), (2, 198745010), (4, 99372505), (5, 79498004), (10, 39749002), (20, 19874501), (89, 4466180), (107, 3714860), (178, 2233090), (214, 1857430), (356, 1116545), (428, 928715), (445, 893236), (535, 742972), (890, 446618), (1070, 371486), (1780, 223309), (2087, 190460), (2140, 185743), (4174, 95230), (8348, 47615), (9523, 41740), (10435, 38092), (19046, 20870)]