21615730

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{3923}}^1$

素因数の和:3978

約数の個数: 32

約数和(自身を含む): 42379200

約数和(自身を除く): 20763470

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 95, 145, 190, 290, 551, 1102, 2755, 3923, 5510, 7846, 19615, 39230, 74537, 113767, 149074, 227534, 372685, 568835, 745370, 1137670, 2161573, 4323146, 10807865, 21615730]

約数ペア:

[(1, 21615730), (2, 10807865), (5, 4323146), (10, 2161573), (19, 1137670), (29, 745370), (38, 568835), (58, 372685), (95, 227534), (145, 149074), (190, 113767), (290, 74537), (551, 39230), (1102, 19615), (2755, 7846), (3923, 5510)]