20781395

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{2243}}^1$

素因数の和:2374

約数の個数: 16

約数和(自身を含む): 26658720

約数和(自身を除く): 5877325

約数列:

[1, 5, 17, 85, 109, 545, 1853, 2243, 9265, 11215, 38131, 190655, 244487, 1222435, 4156279, 20781395]

約数ペア:

[(1, 20781395), (5, 4156279), (17, 1222435), (85, 244487), (109, 190655), (545, 38131), (1853, 11215), (2243, 9265)]