20901387

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{421}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 32139520

約数和(自身を除く): 11238133

約数列:

[1, 3, 13, 19, 39, 57, 67, 201, 247, 421, 741, 871, 1263, 1273, 2613, 3819, 5473, 7999, 16419, 16549, 23997, 28207, 49647, 84621, 103987, 311961, 366691, 535933, 1100073, 1607799, 6967129, 20901387]

約数ペア:

[(1, 20901387), (3, 6967129), (13, 1607799), (19, 1100073), (39, 535933), (57, 366691), (67, 311961), (201, 103987), (247, 84621), (421, 49647), (741, 28207), (871, 23997), (1263, 16549), (1273, 16419), (2613, 7999), (3819, 5473)]