20987025

素因数分解:

$3^1\times 5^2\times {\mathrm{461}}^1\times {\mathrm{607}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 34831104

約数和(自身を除く): 13844079

約数列:

[1, 3, 5, 15, 25, 75, 461, 607, 1383, 1821, 2305, 3035, 6915, 9105, 11525, 15175, 34575, 45525, 279827, 839481, 1399135, 4197405, 6995675, 20987025]

約数ペア:

[(1, 20987025), (3, 6995675), (5, 4197405), (15, 1399135), (25, 839481), (75, 279827), (461, 45525), (607, 34575), (1383, 15175), (1821, 11525), (2305, 9105), (3035, 6915)]