20381977

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{1187}}^1$

素因数の和:1428

約数の個数: 16

約数和(自身を含む): 25546752

約数和(自身を除く): 5164775

約数列:

[1, 7, 11, 77, 223, 1187, 1561, 2453, 8309, 13057, 17171, 91399, 264701, 1852907, 2911711, 20381977]

約数ペア:

[(1, 20381977), (7, 2911711), (11, 1852907), (77, 264701), (223, 91399), (1187, 17171), (1561, 13057), (2453, 8309)]