66891875

素因数分解:

$5^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:213

約数の個数: 40

約数和(自身を含む): 90720960

約数和(自身を除く): 23829085

約数列:

[1, 5, 19, 25, 43, 95, 125, 131, 215, 475, 625, 655, 817, 1075, 2375, 2489, 3275, 4085, 5375, 5633, 11875, 12445, 16375, 20425, 26875, 28165, 62225, 81875, 102125, 107027, 140825, 311125, 510625, 535135, 704125, 1555625, 2675675, 3520625, 13378375, 66891875]

約数ペア:

[(1, 66891875), (5, 13378375), (19, 3520625), (25, 2675675), (43, 1555625), (95, 704125), (125, 535135), (131, 510625), (215, 311125), (475, 140825), (625, 107027), (655, 102125), (817, 81875), (1075, 62225), (2375, 28165), (2489, 26875), (3275, 20425), (4085, 16375), (5375, 12445), (5633, 11875)]