21997815

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{173}}^2$

素因数の和:368

約数の個数: 36

約数和(自身を含む): 41180904

約数和(自身を除く): 19183089

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 173, 245, 519, 735, 865, 1211, 2595, 3633, 6055, 8477, 18165, 25431, 29929, 42385, 89787, 127155, 149645, 209503, 448935, 628509, 1047515, 1466521, 3142545, 4399563, 7332605, 21997815]

約数ペア:

[(1, 21997815), (3, 7332605), (5, 4399563), (7, 3142545), (15, 1466521), (21, 1047515), (35, 628509), (49, 448935), (105, 209503), (147, 149645), (173, 127155), (245, 89787), (519, 42385), (735, 29929), (865, 25431), (1211, 18165), (2595, 8477), (3633, 6055)]