21509873

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{5701}}^1$

素因数の和:5733

約数の個数: 16

約数和(自身を含む): 27369600

約数和(自身を除く): 5859727

約数列:

[1, 7, 11, 49, 77, 343, 539, 3773, 5701, 39907, 62711, 279349, 438977, 1955443, 3072839, 21509873]

約数ペア:

[(1, 21509873), (7, 3072839), (11, 1955443), (49, 438977), (77, 279349), (343, 62711), (539, 39907), (3773, 5701)]