21099025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1033}}^1$

素因数の和:1105

約数の個数: 24

約数和(自身を含む): 28207520

約数和(自身を除く): 7108495

約数列:

[1, 5, 19, 25, 43, 95, 215, 475, 817, 1033, 1075, 4085, 5165, 19627, 20425, 25825, 44419, 98135, 222095, 490675, 843961, 1110475, 4219805, 21099025]

約数ペア:

[(1, 21099025), (5, 4219805), (19, 1110475), (25, 843961), (43, 490675), (95, 222095), (215, 98135), (475, 44419), (817, 25825), (1033, 20425), (1075, 19627), (4085, 5165)]