20257520

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1399}}^1$

素因数の和:1593

約数の個数: 40

約数和(自身を含む): 47392800

約数和(自身を除く): 27135280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1399, 1448, 1810, 2798, 2896, 3620, 5596, 6995, 7240, 11192, 13990, 14480, 22384, 27980, 55960, 111920, 253219, 506438, 1012876, 1266095, 2025752, 2532190, 4051504, 5064380, 10128760, 20257520]

約数ペア:

[(1, 20257520), (2, 10128760), (4, 5064380), (5, 4051504), (8, 2532190), (10, 2025752), (16, 1266095), (20, 1012876), (40, 506438), (80, 253219), (181, 111920), (362, 55960), (724, 27980), (905, 22384), (1399, 14480), (1448, 13990), (1810, 11192), (2798, 7240), (2896, 6995), (3620, 5596)]