20745921

素因数分解:

$3^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{5519}}^1$

素因数の和:5708

約数の個数: 16

約数和(自身を含む): 31795200

約数和(自身を除く): 11049279

約数列:

[1, 3, 7, 21, 179, 537, 1253, 3759, 5519, 16557, 38633, 115899, 987901, 2963703, 6915307, 20745921]

約数ペア:

[(1, 20745921), (3, 6915307), (7, 2963703), (21, 987901), (179, 115899), (537, 38633), (1253, 16557), (3759, 5519)]