21404025

素因数分解:

$3^2\times 5^2\times {\mathrm{251}}^1\times {\mathrm{379}}^1$

素因数の和:646

約数の個数: 36

約数和(自身を含む): 38591280

約数和(自身を除く): 17187255

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 251, 379, 753, 1137, 1255, 1895, 2259, 3411, 3765, 5685, 6275, 9475, 11295, 17055, 18825, 28425, 56475, 85275, 95129, 285387, 475645, 856161, 1426935, 2378225, 4280805, 7134675, 21404025]

約数ペア:

[(1, 21404025), (3, 7134675), (5, 4280805), (9, 2378225), (15, 1426935), (25, 856161), (45, 475645), (75, 285387), (225, 95129), (251, 85275), (379, 56475), (753, 28425), (1137, 18825), (1255, 17055), (1895, 11295), (2259, 9475), (3411, 6275), (3765, 5685)]