21435785

素因数分解:

$5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{431}}^1$

素因数の和:486

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9668215

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 343, 431, 1015, 1421, 1715, 2155, 3017, 7105, 9947, 12499, 15085, 21119, 49735, 62495, 87493, 105595, 147833, 437465, 612451, 739165, 3062255, 4287157, 21435785]

約数ペア:

[(1, 21435785), (5, 4287157), (7, 3062255), (29, 739165), (35, 612451), (49, 437465), (145, 147833), (203, 105595), (245, 87493), (343, 62495), (431, 49735), (1015, 21119), (1421, 15085), (1715, 12499), (2155, 9947), (3017, 7105)]