20023775

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:499

約数の個数: 24

約数和(自身を含む): 26114400

約数和(自身を除く): 6090625

約数列:

[1, 5, 25, 29, 71, 145, 355, 389, 725, 1775, 1945, 2059, 9725, 10295, 11281, 27619, 51475, 56405, 138095, 282025, 690475, 800951, 4004755, 20023775]

約数ペア:

[(1, 20023775), (5, 4004755), (25, 800951), (29, 690475), (71, 282025), (145, 138095), (355, 56405), (389, 51475), (725, 27619), (1775, 11281), (1945, 10295), (2059, 9725)]