201990995

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 263450880

約数和(自身を除く): 61459885

約数列:

[1, 5, 19, 43, 95, 197, 215, 251, 817, 985, 1255, 3743, 4085, 4769, 8471, 10793, 18715, 23845, 42355, 49447, 53965, 160949, 205067, 247235, 804745, 939493, 1025335, 2126221, 4697465, 10631105, 40398199, 201990995]

約数ペア:

[(1, 201990995), (5, 40398199), (19, 10631105), (43, 4697465), (95, 2126221), (197, 1025335), (215, 939493), (251, 804745), (817, 247235), (985, 205067), (1255, 160949), (3743, 53965), (4085, 49447), (4769, 42355), (8471, 23845), (10793, 18715)]