20993883

素因数分解:

$3^1\times {\mathrm{29}}^2\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:271

約数の個数: 24

約数和(自身を含む): 29725488

約数和(自身を除く): 8731605

約数列:

[1, 3, 29, 53, 87, 157, 159, 471, 841, 1537, 2523, 4553, 4611, 8321, 13659, 24963, 44573, 132037, 133719, 241309, 396111, 723927, 6997961, 20993883]

約数ペア:

[(1, 20993883), (3, 6997961), (29, 723927), (53, 396111), (87, 241309), (157, 133719), (159, 132037), (471, 44573), (841, 24963), (1537, 13659), (2523, 8321), (4553, 4611)]