28780975

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:747

約数の個数: 24

約数和(自身を含む): 37466352

約数和(自身を除く): 8685377

約数列:

[1, 5, 25, 41, 43, 205, 215, 653, 1025, 1075, 1763, 3265, 8815, 16325, 26773, 28079, 44075, 133865, 140395, 669325, 701975, 1151239, 5756195, 28780975]

約数ペア:

[(1, 28780975), (5, 5756195), (25, 1151239), (41, 701975), (43, 669325), (205, 140395), (215, 133865), (653, 44075), (1025, 28079), (1075, 26773), (1763, 16325), (3265, 8815)]