19958025

素因数分解:

$3^1\times 5^2\times {\mathrm{281}}^1\times {\mathrm{947}}^1$

素因数の和:1241

約数の個数: 24

約数和(自身を含む): 33149664

約数和(自身を除く): 13191639

約数列:

[1, 3, 5, 15, 25, 75, 281, 843, 947, 1405, 2841, 4215, 4735, 7025, 14205, 21075, 23675, 71025, 266107, 798321, 1330535, 3991605, 6652675, 19958025]

約数ペア:

[(1, 19958025), (3, 6652675), (5, 3991605), (15, 1330535), (25, 798321), (75, 266107), (281, 71025), (843, 23675), (947, 21075), (1405, 14205), (2841, 7025), (4215, 4735)]