20913747

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{4243}}^1$

素因数の和:4330

約数の個数: 16

約数和(自身を含む): 29334528

約数和(自身を除く): 8420781

約数列:

[1, 3, 31, 53, 93, 159, 1643, 4243, 4929, 12729, 131533, 224879, 394599, 674637, 6971249, 20913747]

約数ペア:

[(1, 20913747), (3, 6971249), (31, 674637), (53, 394599), (93, 224879), (159, 131533), (1643, 12729), (4243, 4929)]