20493025

素因数分解:

$5^2\times 7^2\times {\mathrm{16729}}^1$

素因数の和:16753

約数の個数: 18

約数和(自身を含む): 29561910

約数和(自身を除く): 9068885

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 16729, 83645, 117103, 418225, 585515, 819721, 2927575, 4098605, 20493025]

約数ペア:

[(1, 20493025), (5, 4098605), (7, 2927575), (25, 819721), (35, 585515), (49, 418225), (175, 117103), (245, 83645), (1225, 16729)]