21000252721

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1448593}}^1$

素因数の和:1448728

約数の個数: 16

約数和(自身を含む): 25495254400

約数和(自身を除く): 4495001679

約数列:

[1, 7, 19, 109, 133, 763, 2071, 14497, 1448593, 10140151, 27523267, 157896637, 192662869, 1105276459, 3000036103, 21000252721]

約数ペア:

[(1, 21000252721), (7, 3000036103), (19, 1105276459), (109, 192662869), (133, 157896637), (763, 27523267), (2071, 10140151), (14497, 1448593)]