1388970020

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{108007}}^1$

素因数の和:108659

約数の個数: 24

約数和(自身を含む): 2921400384

約数和(自身を除く): 1532430364

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6430, 12860, 108007, 216014, 432028, 540035, 1080070, 2160140, 69448501, 138897002, 277794004, 347242505, 694485010, 1388970020]

約数ペア:

[(1, 1388970020), (2, 694485010), (4, 347242505), (5, 277794004), (10, 138897002), (20, 69448501), (643, 2160140), (1286, 1080070), (2572, 540035), (3215, 432028), (6430, 216014), (12860, 108007)]