20389929

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4783}}^1$

素因数の和:4829

約数の個数: 24

約数和(自身を含む): 32722560

約数和(自身を除く): 12332631

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4783, 14349, 33481, 100443, 138707, 234367, 416121, 703101, 970949, 2912847, 6796643, 20389929]

約数ペア:

[(1, 20389929), (3, 6796643), (7, 2912847), (21, 970949), (29, 703101), (49, 416121), (87, 234367), (147, 138707), (203, 100443), (609, 33481), (1421, 14349), (4263, 4783)]