18787069

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{641}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 22187520

約数和(自身を除く): 3400451

約数列:

[1, 7, 53, 79, 371, 553, 641, 4187, 4487, 29309, 33973, 50639, 237811, 354473, 2683867, 18787069]

約数ペア:

[(1, 18787069), (7, 2683867), (53, 354473), (79, 237811), (371, 50639), (553, 33973), (641, 29309), (4187, 4487)]